What's the Pokemon?

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Across
  1. 3. A Pokemon that looks like a rat
  2. 4. A Pokemon that looks like a dragon
  3. 5. A Pokemon that looks like a seahorse
  4. 6. A Pokemon that looks like a cat
Down
  1. 1. A Pokemon that looks like a butterfly
  2. 2. A Pokemon that looks like a starfish
  3. 6. A Pokemon that looks like a fish