Its Wave Attack has a very long attack reach, covering the whole stage every time it appears. Its weakness is that it is Single Target, and will therefore hit only the frontmost unit. If your wave blocker is in front of your other cats, usually the base's damage will kill (or at least knock back) that wave blocker and then annihilate all your other units, so be wary of this. However, if your wave blocker is behind your frontmost cat, only that cat will be hit before the wave is nullified. This allows Octopus Cat to render it harmless in a similar manner as it does to Crazed Gross/Manic Macho Legs.
Be careful of its support though, as they are usually the main threat. If underestimated, they can provide a deadly combo with the base.