Numemon

Numemon is a virus type and champion level Digimon that is considerd to be the worst Champion Digimon, along with Sukamon and Nanimon. It attacks by throwing feces at other Digimon and any Rookie Digimon can digivolve into him if they're mistreated by their owner. His name and design are derived from the onomatopoeia for slimy(滑々  Numenume).

Digimon Virtual Pet
Numemon is a champion level that can come from both Rookies Betamon and Agumon if they don't meet the conditions for any other Champion Digimon. It can further Digivolve to Monzaemon if Numemon faught in 15 or more battles and has at least a 40 percent win ration (good luck with that!), he is a slight bit stronger than both of the Rookie Digimon and he's he weakest Champion level Digimon.

Digimon World 4
Numemon is almost seen everywhere in Death Valley.

Digimon Racing
Numemon are all over track Toy Town.

Digimon Battle Spirit
Numemon appears as a field enemy in the "Etemon's Desert" level.

Digimon World DS
Numemon is the Digimon you have the best chance of getting from a normal Digiegg created from matching two random Digimon. While you have a chance of getting another Digimon from the egg, Numemon is 80%. In Digicentral there is a girl who is obsessed with Numemon. Also appears in a quest from an energetic digimon. In another quest you have to show one to the girl in the farm shop.

Digimon World Dawn & Dusk
Numemon is #91 in Digimon World Dawn and Dusk, and is a Tank-class Aquan species Digimon with a resistance to the Water element and weakness to the Metal. Its basic stats are 143 HP, 182 MP, 82 Attack, 97 Defense, 75 Spirit, 69 Speed, and 40 Aptitude. It possesses the Numb Ward 2 and Flee 2 traits.

Attacks

 * Nume-Sludge (ウンチ  Unchi?, lit. "Poop"): Throws its own poop in order to defend itself against intruders.
 * Bomber (ウンチ投げ  Unchi Nage?, lit. "Poop Throw")
 * Renzoku Unchi Nage (連続ウンチ投げ ? lit. "Continuous Poop Throw")
 * Choukyori Unchi Nage (長距離ウンチ投げ ? lit. "Long-range Poop Throw")
 * Chou Akushū Funsha (超悪臭噴射 ? lit. "Super Stinky Spray")
 * Smash