I have been training my pet Rising Sun so I could battle him but when I go to fight the new fish that has been discovered it wont let me choose rising sun T_T....... help me.

Probably because his health is at 0. You need to go see the healer in Riverside Valley.

Ohhhhhh... ok now I feel stupid...

thank you xD

mm this is not much site feedback. ffr. x]

If its not health he might e stuck in another battle. Just go to battle col. and push statistics and check it out :)