Card Trivia:Lock Cat
- This monster's name, design, and effects are synergetic with "Key Mouse", both of which make up a lock and key combination.
- The effect of "Key Mouse" can add one Level 3 or lower Beast monster from the Deck to the hand, including this monster, whose effect in turn can Special Summon "Key Mouse" from the Graveyard.
- The above-mentioned monsters are also synergetic with "Chain Dog", whose effect can Special Summon itself from the Graveyard when there are exactly two Beast monsters on the field, including this monster and "Key Mouse". This, along with the above-mentioned monsters, creates a key, lock, and chain connection.
- The effect of "Key Mouse" can add one Level 3 or lower Beast monster from the Deck to the hand, including this monster, whose effect in turn can Special Summon "Key Mouse" from the Graveyard.
