Ultra Hammer

The Ultra Hammer is the strongest variation of the Hammer weapon in various Mario role-playing games.

Super Mario RPG: Legend of the Seven Stars
The item first appeared in Super Mario RPG: Legend of the Seven Stars. In this game, the Ultra Hammer is Mario's second most powerful weapon. It is found in the Factory, shortly before fighting Count Down.

Paper Mario series
In Paper Mario and Paper Mario: The Thousand-Year Door, the Ultra Hammer is Mario's strongest hammer. In battle, a timed Ultra Hammer attack deals six points of damage to a defenseless enemy without attack-raising badges (while Mario's normal Hammer only delivers two).

Paper Mario
In Paper Mario, the Ultra Hammer is found within the caverns of Mt. Lavalava, and allows Mario to smash Metal Blocks. This allows him and Kolorado to delve deeper into the volcano and eventually face the Lava Piranha. It can also be used to flip hidden panels on the ground, revealing Star Pieces from underneath.

Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, the Ultra Hammer is found inside a chest placed on a high platform in Rogueport's plaza that Mario must use the Spring Jump to dislodge it from underneath. This Ultra Hammer has been downgraded somewhat from the previous game in that it can only destroy Stone Blocks at the most and cannot reveal Star Pieces in the ground. The Ultra Hammer command in battles will knock the front enemy back into every enemy behind it and will always deal 3 damage to enemies attacked behind the front enemy, regardless of attack boosting power-ups and enemy defense.

Mario & Luigi: Superstar Saga / Mario & Luigi: Superstar Saga + Bowser's Minions
In Mario & Luigi: Superstar Saga, the Ultra Hammer is the third and last Hammer upgrade Mario and Luigi receive. After being tasked with going to Joke's End, Mario and Luigi can return to the Hammerhead Bros. who have mastered a "brand-spankin' new hammer makin' technique" and then continue to reforge their Super Hammers into Ultra Hammers. With them, they can break black rocks (golden rocks in the 3DS remake) on the field, giving the duo complete access to the Oho Ocean, and their destination, Joke's End. They also gain access to the second room behind the Hammerhead Bros.' Forge, allowing them to have the chance to win the Secret Scroll 2, and with it, the new Bros. Attack, Cyclone Bros. Unlike the Ultra Hammers in the Paper Mario series, these hammers are not any stronger in battle, and they lack the red stripe.

Trivia

 * Mario & Luigi: Paper Jam's Trio Attack Hammer resembles the Paper Mario series' version of the Ultra Hammer, except that it reverses the colors and it has a star on its end.

Ultra-Hammer Ultra Martello