Huh?

mother 3's character designs are interesting to work with as a fanartist, cuz there's no truly official / "canon" designs for most of these characters beyond their sprites. no official clay models were ever made. smash bros sort of counts if you want it to. (i consider it just a 3D modeling team's best effort to faithfully translate the sprites into models. itoi's art team probably did not oversee the effort in any way, therefore these models don't convey much besides another team's interpretation of those same sprites.) for the most part, we're all just interpreting these little handfuls of pixels in our own ways.

A very specific pet peeve of mine is when people say Homura is 26. Like no??? She’s 14?? “B-but the time loop—” Nuh uh. The 12 fandom calculated years she spent in there cannot account for maturity. Like yes she’s been conscious for 26 years, but out of those 26, 12 were spent repeating the same month and a half over and over. To mature as a person your mind AND body have to mature—those kinda go hand in hand (like you gotta age, time’s gotta pass). And in the timeloop neither happens because 1) she’s in a timeloop so her body can’t age and 2) she’s repeating the same experiences so she’s not going through something new, thus not gaining any new experience, and therefore not mentally aging.

Doylist explanation: They keep making new electric mouse pokemon because they're frantically trying to recreate the success of Pikachu. Or at least because it's tradition at this point.