I didn't really resort to any guides or hints until I started gettiing the same Angel which was Israfel but, it was fun seeing what I ended up with initially without a guide. I recommend you try playing without this guide too first or if you're here, you've probably done that already.

Unfortunately there is no official guide as to how to raise each Angel (at the time of writing), only rough incubation times as hinted by the official Tamagotchi Twitter account. A Japanese YouTube video guesses there's a point system in place and tells you how to raise each Angel but, I haven't confirmed those methods. Instead I spent 2 months gathering info via a mix of Twitter, different blog posts and confirming whether they were correct or not. There's so much info I've decided to separate this guide from my initial review because there's a lot to note.

Please share this guide by linking instead of copying it as I spent a lot of time putting this together, playing through and confirming all the reports I came across before putting this together.

Raising Time & Notes

Excluding sleep time, you've basically got approximately 12.5 hours before the embryo will evolve into a cocoon. I recommend taking a notepad to note down when the Angel was hatched, what time you fed it, when it evolved into a cocoon and when incubation started. This way, you know when you need to pay attention instead of waiting for the next beep or missing one. Only way to do it if you want to get all the common Angels in the group in one go.

Points to bear in mind:

• Every time you feed the Angel, LCL will be released 3 hours later so make use of this timing to spread out the S2 and melon feeding. If you time it right you'll be able to feed 5 times.
• Unless otherewise stated, you start off with 4x S2 and melons then repeat after every LCL clean. You can divide up the number of S2s and melons you need to feed.
• If you get the Angel you want, great! Raise it all the way until the Third Impact which will take 3 days.
• If you don't get the Angel you want, you can let it... expire. This takes approx 24 hours of neglect. It's probably best to mute the sound as there is a very long sound clip when it does expire which can burn a lot of battery. You can also speed this up by changing the time so that it doesn't sleep but don't forget to change it back! (This doesn't work for growing, only neglecting.)
• You must not use the reset button or data will be cleared and you will have to raise the common Angels again to unlock the rare ones. Fresh batteries lasts about 2 months or a bit longer if you keep the sound off.
• Incubation starts approx. 3 hours after it turns into a cocoon before it will beep a second time and stop moving.
• If you hatch the embryo after 8pm which is its bed time it'll end up staying awake for 2 hours before going to sleep.

For example, the way I kept my notes were as follows:

4/10 18:30 Hatched, 4x S2 Mel, BC 2P
8:35, 3x S2 4x Mel, BC 2P, 1x LCL, 1x Int
11:42, 3x S2 4x Mel, BC 2P, 1x LCL, 2x Int
14:48, 3x S2 4x Mel, BC 2P, 1x LCL
17:52, 3x S2 4x Mel, BC 2P, 1x LCL
5/10 19:00 Cocoon
21:00 Incubation
23:00 Hatch
8/10 23:00 Third Impact

16x S2, 20x Mel, BC 10P, 4x LCL, 3x Int

B stands for Battle, C stands for Centre, Int stands for Interrupt Screen etc. I don't think you need to record the time of the interruptions (or "Mixed Signals" as the official English instructions call the little random animations) so you can just group it with the last time fed. Same for the games.

Clock Setting Tip

Is the Angel waking up too early for you? You could always adjust the clock back a few hours.

For example, we know the Angel in embryo form wakes up at 7am so if we wanted it to wake up say at 9am instead, there's a 2 hour difference. So you could adjust the clock 2 hours back instead e.g. real world time is 10:12am so you can set the clock to 8:12am.

Similarly if your playthrough ended at night after 8pm, you could set the clock to 7pm so that the embryo doesn't fall asleep immediately as soon as you hatch it. Then you have some time to feed it before it sleeps instead of waiting 2 hours.

Note you need to set the clock before hatching the embryo. Otherwise you will mess up the timer and the next scheduled feeding time doesn't happen on time.

Conditions

Now here's what you need to do to raise each Angel.

• Rows in green are confirmed via Twitter reports while uncoloured rows are what I just happened to obtain through different means.
• Cocoons should be clean unless noted otherwise.
• Mood during embryo time are in order of poor > ok (smiling) > happy (moving towards camera).
• P means a perfect game, N means a normal clear.

Poor (Bored or hungry)	OK	Happy

4h Common Angels

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Sachiel サキエル	14	14	x	x	3	Y	x	Happy	3h 10m
Israfel イスラフェル	13	0 - 2	7P	x	3	Y	x	OK	1 - 2h	All games perfect.
Bardiel バルディエル	8 - 12	8 - 12	x	x	2	Y	x	OK	Immediately	Keep in OK mood. Time feeding so that it sleeps in LCL or cocoon is in LCL. Another method is to feed it fully after hatching with 4x S2, melons. Clean the first LCL but afterwards, don't feed it fully again until 4 hours before cocoon time. Idea is to leave it half hungry and in LCL when it's cocoon time. Alternatively start off with 4x S2, melons. Then every LCL feed 2x S2, 4x melons. For the very last feed, it should be complaining about hunger. Feed only 1x S2 and 4x melons. 4 hours incubation afterwards it should become Bardiel too.
Shamshel シャムシェル	x	8	x	x	x	N	x	Poor	Immediately	Abuse but remove AT Field if you get it.
Zeruel ゼルエル	14	14	2P / 1P 1N	x	3	Y	x	Happy	3h

4h Rare Angels

After raising all 5 common Angels from above; Sachiel, Israfel, Bardiel, Shamshel and Zeruel, here is how you can get Lilith and evolve her into other Angels, mainly Rei.

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Lilith リリス	6 - 10	6 - 10	3P	3P	All	Y	x	OK	Immediately	Feed 1x S2 Mel approx every 2h.
Lilith > EVA-01	7	7	13P	3P 3N	All	Y	x	OK	25h	After raising Lilith, you have 25 hours to evolve Lilith to EVA-01. All reports point to lots of battles.
Lilith > Young Rei 幼いレイ	7	7	3P	3P	All	Y	7 (Min 3?)	Happy	25h	Almost the same as Lilith. After you've raised Lilith, you have 25 hours to evolve Lilith to Young Rei. Otherwise you've failed.
Pilot Rei パイロットレイ	6 - 10	6 - 10	3P	3P	All	Y	x	Happy	Immediately	After successfully raising Young Rei, raise the embryo in the same way as Lilith.

After raising the common Angels, you can also go for the Adam route to raise Kaworu too.

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Mark 6	16	16	3P	3P	4	Y	x	Happy	< 1h	Think you have to win 3P in a row for both games. Feed 3x S2s, 4x Mels every clean. Someone suggests this is same as Zeruel.
Adam アダム	16	16	3P	3P	4	Y	x	Happy	Min 1h	Basically the same as Mark 6 but slightly longer incubation time.
Adam > Kaworu 渚カヲル	10	15	15P 3N	16P 2N	4	Y	x	Happy	25h	Once you've raised Adam, continue raising him the same way; keep happy by feeding 2x S2, 3x Mels every clean. I had max 10P battles in a row, 9P centres in a row. Some reports say they managed by winning 10 perfect of each. If you manage to get him (yay!), keep the sound on for a little surprise. Otherwise like Young Rei, if you don't manage to evolve Adam to Kaworu in 25 hours you've failed.
Kaworu > Mass Production 量産機	6	11	34P 1N	10P	4	Y	x	Happy	25h	Playing sims a lot will change Kaworu into this. I had max 14P in a row for battles. Some reports say only 20P battles and 7P centres needed.

4 - 8h Common Angels

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Sandalphon サンダルフォン	15	19	x	x	3	Y	x	Happy	4h	Easiest to obtain as I got this Angel most of the time. Just keep happy with melons and keep fully fed.
Sahaquiel サハクィエル	16	x	10P	x	3	Y	x	Happy	4h	I think this is just slightly different from Sandalphon. You just need to play games with it instead of using melons to keep it happy.
Gaghiel ガギエル	16	35	x	x	3	Y	x	Happy	7h	Took me many tries to get this. Key seems to be you have to starve it. Start off with 4x S2 and melons then, every LCL feed 4x melons to keep it happy. Don't feed any more S2s until it's complaining about hunger.
Matarael マトリエル	4	5	x	x	x	N	x	Poor	4h	Easiest to get as all you have to do is neglect it. Just remember to remove the AT Field if you get one like the other poor care Angels.

4 - 8h Rare Angel

After raising the 4 common Angels above; Sandalphon, Sahaquiel, Gagihiel and Matarael you can raise this.

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Third Angel 第3使徒	17	20	10P	7P 3N	All	Y	x	Happy	6h	Got this first try just by giving it plenty of everything. 4x Melon, 2 of each game every LCL and feed until full.

8h+ Common Angels

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Ramiel ラミエル	16	x	6P	6P	All	Y	x	Happy	8h	Start off with 4x S2, one of each game. Then repeat for each LCL but you should only need 3x S2 to feed it full. For the last LCL, play 2 of each game instead of just 1.
Leliel レリエル	13 - 16	13 - 16	x	x	All	Y	x	Happy	8h	This seems to be easiest to get. I got this Angel most of the time while trying to get Armisael... Watch out for a special interference scene exclusive to this Angel once you've raised it.
Arael アラエル	14 - 16	x	10P	10P	All	Y	x	Happy	8h	Keep sound on before hatching for a little surprise.
Armisael アルミサエル	10	20	x	x	All	Y	x	Happy	8h	Seems you have to starve it. Start off with 4x S2 and Melons. Then feed it 1x S2 and 3x Melons every LCL. If it complains about hunger, feed it 1x S2.
Ireul イロウル (MAGI)	6	4	x	x	All	Y	x	Poor	8h	Easiest to get as you just have to abuse it with poor care like Shamshel and leave it in LCL when it turns into a cocoon.

8h+ Rare Angel

Didn't realise this clockwork Angel that appears in Evangelion 2.0 was a replacement of the TV series 7th Angel, Israfel until I played with this Evatchi...

	S2	Melons	Battles	Centres	LCL	Lights	Ints	Mood	Incube	Notes
Seventh Angel 第７使徒	16	20	13P	10P 1N	All	Y	1	Happy	8.5h	You can raise this after you've raised the 5 common Angels above; Ramiel, Leliel, Arael, Armisael and Ireul. Aimed at raising this the same way as the rare Third Angel and I think the key is playing 10+ of each game. Less than that (around 5) I only got Arael.

Results

For those curious here is what my three runs were like. First run's first half was mostly done blind as mentioned earlier. More fun that way.

1st Run (2 Months on Test Batteries)

Israfel, Sachiel, Israfel, Leliel, Israfel, Shamshel, Israfel, RESET, Ramiel, Shamshel, Sachiel, Zeruel, Bardiel, Israfel, Lilith > EVA-01, Lilith > Young Rei, Pilot Rei.

2nd Run (Batteries Replaced)

I had raised fairly much every Angel from the 4h group so I pretty much knew exactly what to do to reach the rare Angels stage. This time my focus was on Adam and Kaworu as I didn't have enough battery left to get them first run.

Battery lasted two weeks longer because I left the sound off most of the time.

Ended up getting the following:

Shamshel, Israfel, Bardiel, Zeruel, Satchiel, Mark 6, Israfel, Mark 6, Adam > Kaworu (Tabris) > Mass Production, MAGI (Ireul), Arael, Leliel, Leliel, Leliel, Leliel, Arael, Ramiel, Leliel, Leliel, Ramiel, Arael, Leliel, Armisael, Arael.

3rd Run (Batteries Replaced)

Sandalphon, Sahaquiel, Matarael, Bardiel, Bardiel (might have been under 4 hours incubation twice...), Sandalphon, Sahaquiel, Matarael, Sandalphon, Sandalphon, Sandalphon, Gagihiel, Third Angel, Armisael, Arael, Ramiel, Leliel, Ireul, Arael, Seventh Angel.

And that's me pretty much raised all 24 Angels on the Evatchi!

Well, feel free to let me know how you got on by dropping a comment here to help confirm the tips I haven't confirmed yet (rows that aren't in green). You'll help out fellow Eva fans trying to raise all Angels too I'm sure.

Have fun ^^