The gameplay isn't really THAT good with various attacks missing (each Pokemon has one or two basic attacks, one for each type) but it is a Pokemon game so I can't help but to like it.
The graphics are minimal, but the animated HP bars are a nice touch.
It's not much fun to control.
This file is WAY TOO LARGE. My TI-84+ can barely run it when I have everything else archived. If you play for too long you get ERR:MEMORY and there isn't enough memory to get through the elite four. And to make this worse, it's a BASIC file with tons of tiny sub-programs so if you lose one or archive the wrong one the whole thing doesn't work. I hate games what make you compromise math functions for games. And the menus aren't much fun either (although I do appreciate the Pikachu picture)
If you're a pokemon nerd you might come back to it but the file is annoying to have and it's a lot more fun to catch 'em all on a gameboy. There is link play but I don't see a lot of battles going on.
Only play this if you really like Pokemon.