TTT2U, the arcade version, has three extra sets of character illustration in 2D done by (I do not know if they are well known) artists JUNNY, Tomio Fujisawa and Shunya Yamashita.

Not all of these are in full resolution nor they're complete (this one has all 44 characters though and they aren't complete by lack of one or two characters) but if I ever find full-res and complete samples, I'll update these.

Easily the best out of the three artists dealing with the game. Yamashita's awesome but it does not quite fit.

Base +7, Mr.Sparkman +4

I wonder if there's classic portrait were avaliable to get them...

Base +10