The user can cause themselves to explode with varying effects from simply blowing open a door to explosions with the magnitude of nuclear explosions and recover/reassemble. They may be able to control the strength of the explosion, blow up portions of their body, or severe parts of their bodies and let it explode at contact with the enemy.
Super Buu (Dragon Ball Z) preparing to self-destruct.
Vegeta (Dragon Ball Z) unleashing his Final Explosion.
Peter Petrelli (Heroes) about to explode.
Painting by precognitive Isaac Mendez (Heroes) of "The Exploding Man".
Deidara (Naruto) using C0 to cause himself to explode, in his failed attempt to take Sasuke with him.
Mr. 5 (One Piece) detonating his body parts without any harm to himself.
Black Fog (Pokémon) using Explosion to detonate its own body, causing devastating damage at the cost of much of its health.
Black Fog (Pokémon) using Self-Destruct as its last resort, exploding and killing itself rather than being captured by a human.
Using Chaos Blast, Shadow the Hedgehog (Sonic the Hedgehog) unleashes a massive explosion of Chaos Energy.
Octopods (Splatoon) will self-destruct if Agent 3 draws too close.
Creepers (Minecraft) can self-detonate, destroying themselves and nearly anything within its blast radius.
In a last effort to defeat Team MÄR, Kapellmeister (Marchen Awakens Romance) overflows his entire body with magical power, causing him to explode.
Spawns/Tarbabies (Quake series) are known to self-explode once they are killed.
Once they begin to die, Wraths (Quake: Dissolution of Eternity) can automatically self-destruct, damaging anything that's within their vicinity.
Allu Majuu (Marchen Awakens Romance) will detonate itself when its user Phantom gives the order.
The Trick-Or-Treat (Marchen Awakens Romance) guardians will explode if their heads are touched.
Upon getting killed and defeated, a Welder's (New Blood Interactive's DUSK) canister that links to their fire ball-based gun, will happen to inevitably burst into flames and causing their clothes to ignite. In roughly a second, the canister will detonate, harming their nearby allies if they aren't careful.
Bomby (Valkyrie Crusade) can explode herself without any ill effect.