Badtz-maru's Really Bad Day. Give Badtz-maru a Water Balloon. Badtz-maru's Unbelievably Bad Day. I've Badtz-maru Meditations on Resilience (book) Cave Fishing. Catch a fish in Gemstone Mountain caves.

Badtz-maru likes gifts that are tagged with Joke, Tropical, or Pizza. The best starter gift for Badtz-maru besides Pineapple (or any other tropical food and critter) is Pineapple Pizza.