Hmm, interesting debate. Let's take a crack at it.
So first off, I'm just going to assume that they're at roughly the same AP, due to Voodood scaling to other Skylanders such as Sonic Boom, and Tony, though a bit of a scaling tree, is notably weaker than a semi-serious Elizabello II. So, people could probably correct me later, but for now, I'm assuming approximately equal.
And now, to knock out some abilities from both sides. Chopper's Limited Information Analysis isn't very applicable here due to Voodood not really having any weaknesses going into this fight. And since this is 7-B, no Berserk Mode for Chopper when he goes Monster Point. As for Voodood, his Attack Reflection with his Tripwires is useless here considering Tony doesn't have any actual projectile attacks. Now, with that out of the way, what are the advantages here.
Unfortunately for the Skylander, Tony does have a considerably higher intellect and a much greater strength capacity than Voodood, meaning he'll be able to think up strategies much faster than Voodood, and will have the strength to match. If Voodood attempts to close the distance with his Zipline Axe, then Chopper can just change into Jump Point and get away, or even Guard Point and block the attack. And thanks to his Kung Fu Point, he'll be able to outmaneuver Voodood's axe at close range and get some good hits in.
Unfortunately, the biggest hurdle for Chopper to jump through here is Voodood's magic Tripwires, which he can summon at any time, albiet only two at a time, and his Electric Feedback, which will zap Chopper after he hits him. However, once again, Chopper's intelligence will likely help him predict and avoid the Tripwires, and if he takes his Monster Point, which he has control over post-time skip, then he should be able to endure the Electric Feedback and continue fighting.
While admittedly, I'm certain that Voodood would be an extremely difficult opponent for Chopper to put down, I do think that due to the variety he has thanks to his different transformations, and especially his very powerful Monster Point, Chopper should be able to take this fight mid to high difficulty.
Winner: Tony Tony Chopper
