Mario using a Triangular Block
to run up a Warp Pipe
Triangular Blocks (also referred to as Triangle Blocks) are pink, triangle-shaped blocks with faces which are located at the bases of certain walls. They are primarily found throughout Dinosaur Land and first appear in Super Mario World.
If the Mario brothers run onto a Triangular Block, they will be able to continue their sprint by running up the wall that the block is placed against. This technique is required for getting get over tall walls that the they are unable to fly over. Yoshi is unable to use Triangular Blocks, but if he runs onto one, he will bounce high up. If a Koopa Shell hits a Triangle Block, it will also bounce up.
Triangular Blocks as seen in Super Mario Advance 4: Super Mario Bros. 3
Triangular Blocks are also found in a few levels of World-e in Super Mario Advance 4: Super Mario Bros. 3. In addition to appearing at the bases of certain walls, Triangular blocks also appear between walls and ceilings, allowing Mario and Luigi to run up walls and onto ceilings. Only one level released outside of Japan, Slidin' the Slopes, features Triangular Blocks.
Triangular Blocks appear in three episodes of the Super Mario World cartoons. One is first featured in "Ghosts R Us", where Yoshi (who can, staying consistent with the games, only bounce on the block) briefly uses it to travel into Wizenheimer's Haunted House and save Mario, Luigi, Princess Toadstool, and Oogtar. During a later episode, "King Scoopa Koopa", in an attempt to escape from the Chickendactyl-turned Cave People, Mario and Princess Toadstool run up a Triangular Block leading to a Star Path. In the episode "Born to Ride", Mario, Luigi, Princess Toadstool and Yoshi used a Triangular Block to drive up the wall in their motorbikes to avoid Duke, Lulu and Rockman. Rockman attempted to drive up the wall using the block, but failed and crashed (the block was also shown to frown as soon as Rockman failed).
While the block doesn't appear in New Super Mario Bros. U, Mini Mario now has the ability to run up walls in a similar way to the Triangular Block, though he can run down walls as well.
Names in other languages
||Bloco Triangular (Super Mario World manual)
Bloco Triângulo (animated series)