For some reason the text on this site doesn't display correctly for me :/ it's not in English or Japanese, but just...jibberish. It does show various stages though!
http://www.hudson.jp/gamenavi/gamedb/softinfo/tekuteku/zukan2/index.html
This is a scan I found while looking up information on Teku Teku Angel. I believe this is for the first version of Teku Teku Angel. It appears that the forms in the center with the orange column by them are the 'ideal' path to finally end up with an angel. The bottom characters in the groups of 3 look like the 'you didn't walk enough with your pet' outcome, as they all seem chubby ^_^; As for the top characters, maybe you ran TOO much? Not sure...Anyway, here is a translation of the paragraph above!
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あなたが出会ったことがあるジェル君はどれ。
When you meet a gel-kun, which will it be?
出会ったジェル君の個所ハートマークに色をぬり、最初に出会った月日を記入し
ておきましょう。
When you get to the point of meeting a gel, color in the heart mark. At
the first meeting, let's fill in the time of day.
知ってるジェル君と知らないジェル君がひと目でわかるよ。
Gel-kuns you know and Gel-kuns you don't know you'll understand with just
a glance.
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Here are my translations of the names for the 3 lineages. A couple don't have English translations, but the Japanese pronunciation is there.
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ジェル君はベビー期から幼年期、少年期、青年期へと成長して天使になるんだ。
Gel-kun grows from a baby to infancy, childhood, up to adolescence and
becomes an angel.
成長するときにいちばん大切な時期はベビー期。
The most important growth happens when it's a baby.
このときあなたがどのくらいがんばったかで、ヒト系、ケモノ系、ジェル系のタ
イプに分かれるんだよ。
This time, with how persistent you are, you can understand the person lineage,
monster lineage, gel lineage types.
ただし、あなたの努力次第で突然変異することも。。。
However, depending upon your efforts, there could also be variations/mutations...
途中であきらめたらダメだよ！
It's bad if you give up mid-way through!
