Wished I could be more helpful, Effra. Sorry. <:3

Add Override Materials, Go To Element Viewer>Model. Got to Materials. Select the type of material you want to color. Go to Add Attribute and select color. Name it $color. And you can pick whatever color you want. For best results, go to Add Attribute>String and name it "$basetexture" and then name it "white" before selecting the color attribute

It's working and I was able to change color but... sounds tedious and tricky... I'm having troubles to understand actually. For example, I need to recolor the head and body, giving him a green color. Any hints for it?

There should be head and body materials

Huh... I don't get it...

I wish I had time to find a better tutorial

Yeah. It's a bit vague and I need a better explanation. ^^;

Wish I knew how to explain it better

Maybe this will help https://steamcommunity.com/app/1840.....1765134747807/

Okay. I think I understood now. I'm able to change the color now. Still, for some reasons, I thing there is a better way to do that but I have no idea then.

Oh well. Better than nothing anyway. Thanks for your help. ^^

Anytime Giant Bulbasaur ^_^

There really isn't, unless the model itself has bodygrouped colors. Otherwise you're basically throwing a bucket of paint over the entire model.

Alrighty then. Well, I can use and recolor the Yoshi models anyway. ^^
Man~ I kinda wish I could convert those Yoshi models into Bulbasaur ones but I have no experience at modeling at all... ^^;