the length of the stages of life for any given monster is determined by the SUB breed, NOT the main. The following subs have these life stage patterns:

Type 1------------(80097B94 00)

Stage----Length
Stage 1 - 10%
Stage 2 - 10%
Stage 3 - 15%
Stage 4 - 15%
Stage 5 - 10%
Stage 6 - 5%
Stage 7 - 10%
Stage 8 - 5%
Stage 9 - 5%
Stage 10 - 15%

Subs that follow this pattern: Arrow Head, Bajarl, Centaur, Gali, Hare, Henger, Jell, Metalner, Mocchi, Monol, Zuum

Type 2------------(80097B94 01)

Stage----Length
Stage 1 - 5%
Stage 2 - 5%
Stage 3 - 10%
Stage 4 - 10%
Stage 5 - 5%
Stage 6 - 5%
Stage 7 - 15%
Stage 8 - 15%
Stage 9 - 10%
Stage 10 - 20%

Subs that follow this pattern: Beaclon, Dragon, Ghost, Hopper, Mock, Naga, Pixie, Plant, Suezo, Tiger

Type 3------------(80097B94 02)

Stage----Length
Stage 1 - 15%
Stage 2 - 15%
Stage 3 - 15%
Stage 4 - 15%
Stage 5 - 10%
Stage 6 - 10%
Stage 7 - 5%
Stage 8 - 5%
Stage 9 - 5%
Stage 10 - 5%

Subs that follow this pattern: Ape, Baku, ColorPandora, Gaboo, Golem, Jill, Kato, Niton, Phoenix, Worm, Wracky, Zilla

Type 4------------(80097B94 03)

Stage----Length
Stage 1 - 5%
Stage 2 - 5%
Stage 3 - 10%
Stage 4 - 10%
Stage 5 - 10%
Stage 6 - 5%
Stage 7 - 15%
Stage 8 - 15%
Stage 9 - 10%
Stage 10 - 15%

Subs that follow this pattern: Ducken, Durahan, Joker, Mew, Undine

I can force the Market to give me a ??? sub, but it is not identical to the ones off of the CDs (apparently, modifications for ??? subs are coded somewhere in the Shrine sequence, something which I have no way of altering). I don't have most of the ??? CDs (I have some, but most of them are the wrong printing), so I don't really have any way of analyzing them. So far, the only one that I have observed is the Chinois [Metalner/???], which has a Type 2 life stage pattern. In addition to that, it has different Stat Acquisition rates than a purebreed Metalner (more Int and Spd, but less Lif and Def). Aside from that, it seems to be identical to an ordinary Metalner. We know that Time Noise has a substantially higher Guts Regen than an ordinary Naga, and there may be a few other different things as well. Judging from this, I would speculate that each ??? monster is nearly identical to the purebreed, but with a few minor changes, like lifespan potential, life stage type, guts regen, etc. But back to the topic at hand, I will hopefully have more information on the stat gains during each life stage (but that will take quite a bit of time).

-Nevistar