Monster racers question where to get the monsters like champions?

So like reinhart, i know that he has the legendary monster for the fire. and like krystal its a hawk or something i found in the grass area thingy i forgot and flypid i found in the back of the ruins. where else can i find the other 4 monsters used from the champions?

Bruce's Rocktops was in erm...I think it was either in an area with waterfall or a desert. Can't remember too much. Haven't play it in a while, sorry =P