S1·E37 Mīkun's Mansion of Life

The 999 approaches the planet Mīkun's Mansion of Life, and all the passengers appear depressed, closing the blinds as they approach it. When Tetsuro and Maetel arrive at the hotel, Tetsuro finds a tiger and snake in the hallway, so he hides in his bed the rest of the night. The next day Maetel introduces Tetsuro to Mīkun, who takes care of all the various animals on the planet, which are actually all dead animals beloved by their master.