Like the others game, WarioWare Touched, Mona seemed to have a counterpart in Pizza Dinosaurs, Vanessa
In WarioWare Smooth Moves, there's Jimmy P. Where we saw in a cutscene they bumped into eachother (from what I remember.. )
In WarioWare Gold, there's 13-Amp,
In WarioWare Get it Together...
So Wario Land doesn’t really have a cast apart from Mad scienstein and Syrup, but If it did it would probably have something feel more alive characters Like Mona in Land games already make sense since she wants to be an adventurer, or his band of monsters in Woods would be fun to see
Just to name the top 11 most obvious examples IMO:
Ultimate Supreme Executive Chairman Drek (Ratchet & Clank 1): While he may have been considerably humanized by the game's (incredibly lame) PS4 reboot, Chairman Drek was absolute pure evil incarnate back in the original 2002 version of R&C...