Gloomba

Gloombas are blue Goombas that appear in the Paper Mario series. Gloombas live deep underground, in areas such as Toad Town Tunnels and the Pit of 100 Trials. These Goombas are much more powerful than their surface-dwelling cousins. The coloration of Gloombas resemble that of the Goombas found in underground levels in Super Mario Bros. which, according to their Catch Card description, is the result of their living without sunlight. Their name is a portmanteau of gloom and Goomba.

In the Prima Super Paper Mario strategy guide, it is stated that Gloombas can poison the player, although this is false.