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The idea with this thing is that, in addition to stretching and squashing itself, it generates electricity by being hit by its opponents. At least that seems to be what they're suggesting with its ability, which is a cool way of integrating its design into gameplay, as well as the fact that it's never the first one to attack...
But if it's supposed to be a fat blob that takes attacks then dishes out more powerful ones, why would it want to scare enemies away with the fake eyes? Wouldn't it rather look unintimidating to invite careless attacks, like Wobbuffet?