Outwardly, the Explode-o-nuts look like regular coconuts, except for a hole in their shell, indicating a Spider Bomb is inside. As per their design, the Explode-o-nuts can blow up by having their Spider Bomb detonate, although they can at best inflict bruises. When about to detonate, the Explode-o-nuts' holes will flash red.
For an absurd plot, Dr. Eggman set out to turn Seaside Island's coconuts into Explode-o-nuts with his Spider Bombs. As he invaded a forest to make Explode-o-nuts however, Team Sonic came and beat Eggman by returning the Explode-o-nuts he used against them as they detonated. While Eggman's plan failed, some Explode-o-nut remained. A dud was used by Team Sonic to fight the Froglodytes, and a stray one dropped in on Eggman, destroying the comic he had just bought.