>>34520017The beasts take a really long time to catch with Coliseum's mechanics, plus an even longer time to purify, and then an even longer time to purify/level up until they had OK moves.
XD hands you the best TM's in the series, as well as loads of really strong, useful mons to catch. Hell, I threw a Masquerain onto my team just because it felt so OP and I still swept Gonzap so fast I never even got to see that Slaking strategy you described.
>>34520019I mean the majority of the Coliseum Pokedex is Gen 2 Johto shitmons, because those were the Pokemon shoehorned into the game because they were missing from Ruby and Sapphire. Whereas nearly everything you can catch in XD is strong and viable.