Housemon

Housemon is literally a giant house, and is a minion of the Dark Master Puppetmon. It appears in the episode Ogremon's Honor. Puppetmon activates Housemon to battle the DigiDestined when he loses his hammer and is forced in a corner. In the original anime, it is not a Digimon but rather a "toy" that Puppetmon made himself.

Digimon Adventure (manga)
In the TOKYOPOP adaptation of the anime series, Puppetmon's mansion is a Digimon called Housemon. Housemon proves to be a powerful adversary, driving the DigiDestined back. It is destroyed when Puppetmon is defeated by MetalGarurumon. The other DigiDestined know that Puppetmon was defeated after his section of the tower disappears.

Digimon Adventure (anime)
When Puppetmon is in danger, he calls Housemon to his side in an attempt to escape, and brings him to "play" with the DigiDestined.