In my mind, this is really a fight between Squarrel and the Red Panda, and that's down to RP's tech and support.
Phantom Ray's ability to fly and turn translucent is useless against RPs remote spotting support, and his gun turrets would allow him to seek out and blow PR out of the sky before he gets anywhere near RP.
Which leaves Squarrel. Squarrel has no ranged capabilities, so we can assume he's used to dodging anything coming his way to get within chewing range. Squirrels move like little, rabid balls of lightening, laping from tree to tree, dodging behind cover, changing direction as if they're not on speaking terms with the laws of physics. The question is; can he get to RP to make those teeth and claws count?
I don't think he can.
RP's utterly convicted to his cause, and nothing but victory would suffice for him. He'd be able to keep his cool and make every shot count before Squarrel could get near him.
And everyone that voted for Phantom Ray were just pulled in the the cool looking wings, pah! One Steve Erwin does not a mega beast make.
Let me through, I'm a colour therapist!