To find the weird Pteradon, go to the area around Plazma Base and bomb all the breakable chunks of ice. If you find something that looks like a wing, go and pick it up. It will say that you found an ice flower, and the dino-bird pteradon will come and eat a petal from the bunch, and then join. His power is that bomb power will go down 1 level. To find the fish, Maringon, go into the sea. There should be a barrier of fishes. go up to the fish, take out the fish hook and pick up the power of linebombs. To find Th. Liger, after you get Dorako go to the cave that you get the disinfectant that heals Kai-man, go to the part of the caves that is dark, and set Dorako,look around, and nab the flaming cat, and set him to slow all the nearby enemies.
To walk through breakable blocks, walk around in the desert, and if you see an oasis, go up to it, and you will go down to a secret room, and you will then see the Karabon. Talk to him and then he will join.