Each of the given triplets of clues leads to the name of a single fictional character. The trios of characters all share a certain characteristic, and the final answer is a character who combines all three of these attributes. The completed bracket is shown here:
The final answer, at the right side of the bracket, is PIKACHU.
**Technically, pikachu is not the only electric mouse pokémon. However, the three pokémon given are all basic generation 1 pokémon, which does uniquely clue pikachu.