Okay, I've come up with some more :ideas.
Ducky's a complete min-maxer, explaining her speech impediment and the fact that she's two inches tall. Unfortunately, her player thought there would be a lot more combat, making most of her skills worthless. However, she does still like to hang her superiority over everyone else.
Spike's actually an NPC. Ducky's familiar, to be precise. Due to the fact that he's considered worthless, stuff like this tends to happen:
Ducky (D): So there might be a trap?
GM: Yes.
D: I send Spike.
Still need help with Cera and Petrie, guys.
!UPDATE!
Just a little preview:
(In VIII, with Ducky at the lake, right before the "Mad" song I can't remember the name of)
Ducky (D): Stupid GM... Lowering my "control" stat... Made Spike waste my +10 treestars...
GM: It was that, or have you eat them and murder the entire Valley.
D: Now that you mention it...
GM: NO.
(Spike eats the melon)
Littlefoot (L): Darn it, that was plus 50! So do I get an improved Strength stat?
GM: You know what? You get a -10.
L: You ever wonder why I hate your guts? Because this is why.