How well would the collectable monster genre work in GURPS?

[Disliker of the mary sue]

I been wondering this for awhile now and just got the guts to ask since my curiosity has just been burning on this question.

Basically by collectable monsters I mean such shows such as pokemon or digimon, ect. Where you basically got a little monster(S) that fight other monster with people serving as trainers for these monsters. Just how well would this work in GURPS, the two obvious problems I figured was the paperwork involved in creating a decent amount of monsters if you had to write a template for every single creature, Considering most series I seen had at least a hundred different species and the long runners have somewhere near 600-1000 different species...yeah I think it would take awhile to write those up. The other problem is I thinking since a creature probably be an ally with summonable modifier players would not have much control of the battles since most battles would be between the creatures in these kinds of worlds it would probably consist in game of giving a creature a command and roll something to see if it obeys you, which seems like it would be kind of boring. But Considering my inexperience with the system maybe I am wrong, or maybe their even worse problems that I not thinking of.