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I believe the party members are both Donald and Goofy. It was pretty easy to see the second party member as Goofy. The top one looks like Donald but he is looking side ways like it's 2 dimensional.
Honestly, I'd rather wait for KH3 to bring back Donald and Goofy. Sora really needs to work out the issues between himself and Riku by himself. It was working with Donald and Goofy over Riku that added to the feelings of jealousy and mistrust between them in the first place.
I just hope that by the end of KH3D, Sora and Riku will have put those issues behind them and trust each other completely.