Steve places a block of TNT in front of him or right below him if performed in the air. TNT requires 50 "points" of materials to place, which are consumed least-valuable first; each dirt is worth 2 points, each wood and stone are worth 5, and each iron is worth 10. If the special move button is tapped while on the ground, Steve will place the TNT in front of him with a pressure plate under him; the plate must be released first to arm it. Stepping on or attacking the plate will then detonate the TNT and result in a large explosion for high damage and knockback; the closer to the TNT a player is, the more damage and knockback they'll take. This explosion can also harm the Steve player that spawned it. Notably, the pressure plate can be triggered by the Minecart, opening up possibilities for traps and setups for Steve players.
A trail of redstone ending with a pressure plate can be placed by moving while holding the special move button after placing the TNT, which will form in block-wide lengths in front of Steve. Steve can safely walk through the TNT to place the trail on the other side. After placing a trail, releasing the special move button will convert the redstone in front of Steve into a pressure plate. Any case of the TNT exploding via the pressure plate will increase the damage it does. Each unit of redstone can place a trail of up to 9 blocks long. A redstone trail is limited to a length of 10.
A TNT dropped from the air will have no redstone trail but can be applied with one if Steve stands next to the TNT, performs a down special and holds the special move button. The same can be done next to a pressure plate to place or extend a redstone trail. If a TNT block is struck with an attack, it will be knocked away a bit and reduce its detonation timer. If the TNT is knocked over one block length away from its redstone/pressure plate, the latter will disappear and be wasted and the TNT loses its trigger, but can be reapplied with one if the TNT's remaining time allows it. If redstone is applied on a TNT block that already has a trigger set on its other side, the old trail disappears and will be overridden by the new redstone trail.
The TNT also detonates when hit enough times, being especially unstable to flame moves. The TNT explosion triggers a Special Zoom if it hits anyone who didn't trip the pressure plate. If two Steve players place their TNT blocks next to each other, an activated pressure plate will detonate both of them at once. Players that activated the pressure plate but are within range of the explosion will take half the explosion's damage and knockback, and no Special Zoom.
KOs caused by a TNT explosion will be credited to the player who triggered the pressure plate or set it off with an attack, regardless of the Steve that spawned it. Otherwise, the KO will count towards that Steve.
The TNT block itself can be mined from, which will yield only iron and redstone in addition to the rare materials, gold and diamond. Mining the TNT block does not affect its duration in play.
TNT is also seen in House of Boom, where it is ignited through Creeper explosions, destroying the structure and damaging the opponent.
TNT is a block that can be crafted using 5 gunpowder and 4 sand. When activated, it ignites for a few seconds before exploding, creating a crater. TNT can be detonated using a flint and steel, any redstone device, a flaming arrow and other nearby explosions.
Due to the absence of gunpowder in Ultimate, other common materials are used as an ingredient instead, like dirt and stone.