Wait, why would Pkmn Trainer get the axe? He's extremely unique.
The time of balancing him is that of balancing multiple characters, so he's the most efficient cut time-wise.
You see, balancing Pokemon Trainer takes multiple
combinations of characters into account:
ABC (Squirtle, Ivysaur, and Squirtle together)
AB (Squirtle and Ivysaur)
AC (Squirtle and Charizard)
BC (Ivysaur and Charizard)
A (Squirtle)
B (Ivysaur)
C (Charizard)
So instead of Pokemon Trainer taking the time to balance of three separate characters, he takes the time of
seven. (Rather than having three characters each balanced individually against each other character in the cast, you have to take every combination of those three characters and balance them
together against the rest of the cast.)
So, if Pokemon Trainer was cut, you'd be getting time that's comparable to cutting seven
separate characters (or six if Charizard remains). If you have to choose between multiple characters and Pokemon Trainer, Pokemon Trainer's cut makes a lot of sense.