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Gentlemen, let me introduce you to the disk-winged bat. As the name implies, it's equipped with little suckers on it's wings, that allows it to attach itself to smooth surfaces such as leaves, glass and so on.
In pokémon terms, it would be a Flying/something else type with Suction Cups. Which would make it even more annoying than Zubat, but I don't care. Disk-winged bats are awesome.