The Sheep Block is a gimmick from Mega Man 10, found in Sheep Man's stage. It is a coloured block that deletes itself and all adjacent blocks of the same colour when stood on.
Sheep Blocks were first available in the devkit for Make a Good Mega Man Level 2, and appeared in the entries Snow Man, Gigavolt Man, Dragon Lab Lair, Colorful Hall, Chomp Man, Forgotten Fortress, Joe Destruction Co., and AD 2101. It also appeared in the Wily stage Reality Core, the Tier X stages Deep Thoughts and Swiss Hotel, and the Pit of Pits sublevels "Deja Vu" and "Sheep Obstruction".
Sheep Blocks come in four colours; blue, green, red, and yellow. If Mega Man jumps on one, then it and all Sheep Blocks of the same colour that it directly touches will flash for a few seconds before vanishing entirely. Also present in the same colours are "Sheep Spikes", which instantly kill Mega Man the way regular spikes do, but will be destroyed when an adjacent same-coloured Sheep Block vanishes.