Even though he is large in size, he can move very suddenly from room to room.
One of the questions that Sufuikuizutchi asks is, what has four legs, and then two legs, and then three legs? Mametchi used his smarts to answer this question - People crawl when they are babies, like they have four legs, and then they have two legs when they learn to walk. Then, they have three legs when they are old because they have a walking stick. He was about to say Tamagotchi, but then he remembered that some Tamagotchis (like Gotchi King) don't have legs. Mametchi realised that the answer was a human, such as Tomomi.
Sufuinkuizutchi's name is a blend of sphinx (スフィンクス sufinkusu) and quiz (クイズ kuizu).