Ivysaur is a playable character in Super Smash Bros. Ultimate. It was confirmed on June 12th, 2018. Along with the Pokémon Trainer, Ivysaur is classified as fighter #34.
Justin Anselmi and Inuko Inuyama, its English and Japanese voice actors in Pokémon the Series: XY, reprise their roles in the game, replacing Craig Blair and Tomoko Kawakami's portrayals from Super Smash Bros. Brawl.
Changes from Super Smash Bros. Brawl
Ivysaur was previously considered the worst Pokémon in the Pokemon Trainer's party and one of the worst characters in Brawl (especially if judged as a standalone fighter), due to its large amount of significant weaknesses, namely short range on its attacks, notable KO problems due to laggy finishers, bad aerial game, terrible recovery and one of the worst special movesets in the game. Likely as a result of this, Ivysaur has been heavily buffed in its transition to Ultimate.
Ivysaur's biggest buffs come from the adjustments to the Pokémon Trainer's mechanics alongside universal gameplay changes. The type effectiveness mechanic (which previously gave Ivysaur a disproportionate weakness to the common flame-type attacks throughout the cast) has been removed, while the elimination of stamina allows Ivysaur to stay in the fight without weakening its moves. The removal of edgehogging, the introduction of ledge trumping, and the various changes to tether recoveries have substantially toned down a critical weakness in Ivysaur's recovery, due to its reliance on one. Ivysaur's air speed is also much higher and it can switch to Charizard at any time in the air to return to the stage. The changes to SDI also heavily benefits Ivysaur's multi hit moves as they are more reliable than previously.
Ivysaur's entire moveset has also been modified and is significantly more useful overall. The addition of a finisher and the changes to neutral infinites makes its neutral attack more consistent, while down tilt now consists of only one hit that semi-spikes. Some of Ivysaur's notoriously weak attacks, such as down smash and back aerial, have had their power increased, with down smash now having a sweetspot that can KO at realistic percents. Ivysaur's entire aerial game has received several improvements: it has a new, disjointed neutral aerial that performs much better than its old one, which was previously a situational move that was easy to escape. Up and down aerials' momentum changes are less extreme, and down aerial's infamously weak and hard-to-sweetspot meteor smash has been buffed significantly, losing its sourspot and now functioning as a powerful edgeguarding tool, while the changes to grounded meteor smashes grant it extremely rewarding setups at a wide percent range, including into up smash. In addition, Ivysaur's throw game has been heavily improved as it now has a KO throw in the form of back throw, alongside increased followups from up throw and down throw due to the changes to hitstun canceling. Lastly, its entire special moveset has been improved: Bullet Seed now has a finisher, Razor Leaf's infamously unreliable trajectory is now more consistent, which makes it a noticeably better projectile, and Vine Whip no longer causes helplessness, which grants Ivysaur a new offstage attack and combo finisher.
However, Ivysaur still retains many key flaws from Brawl. Many of Ivysaur's weakest attacks are still ineffective for KOing despite their buffs, while some (such as forward and back aerials) send at a diagonal trajectory that make them mediocre for edgeguarding. It has also received a few nerfs: Bullet Seed has had its maximum damage output significantly reduced, and Vine Whip has lost its grounded hitbox that leads into the vine. Ivysaur is still one of the few characters entirely dependent on a tether recovery, giving it notable problems offstage, which is further harmed by tethers no longer being usable out of an air dodge. Some of Ivysaur's stronger kill moves such as up smash, forward aerial and up aerial are weaker and finally, the reduction to Ivysaur's weight and the removal of momentum canceling hinders its survivability.
Regardless of its nerfs, Ivysaur has improved dramatically since its introduction in Brawl, especially in relation to the rest of the cast, and is generally agreed upon to now be the Pokémon Trainer's best Pokémon, as opposed to the worst as in Brawl. It now performs more effectively as a character in the Pokémon Trainer's party, fulfilling the role of the "zoning" fighter with disjointed range on its attacks, a conventional projectile, and setups into its powerful bud-based moves.
Ivysaur has been nerfed via game updates. Its biggest nerfs were to its infamously potent down aerial: in addition to its sweetspot becoming smaller, its sourspot's already low knockback was decreased even further.
For a gallery of Ivysaur's hitboxes, see here.
Note: All numbers are listed as base damage, without the 1v1 multiplier.
Pokémon Trainer releases Ivysaur from its Poké Ball while saying "Go!" or "Ivysaur!"
During Ivysaur's victory poses, the Pokémon Trainer says randomly either "You all did great!" (male)/"Everyone did great!" (female) or "Way to go, Ivysaur!" (がんばったな、フシギソウ！, while the female Trainer can say がんばったね、フシギソウ！, You did great, Ivysaur!).
Role in World of Light
During the opening cutscene, Ivysaur was sent out by Pokémon Trainer, along with Squirtle and Charizard, shortly before Galeem unleashed his beams of light. Under Pokémon Trainer's command, Ivysaur used Solar Beam in an attempt to fight the beams of light, but this attempt failed. Pokémon Trainer, Squirtle, Ivysaur and Charizard were all vaporized and placed under Galeem's imprisonment along with the other fighters, excluding Kirby.
Pokémon Trainer can be found at the southeast near the maze that resembles Pac-Maze. Defeating him allows access to all of their Pokémon.
Ivysaur's Fighter Spirit can be obtained by completing Classic Mode. It is also available periodically for purchase in the shop for 500 coins. Unlocking Ivysaur in World of Light allows the player to preview the spirit below in the Spirit List under the name "???". As a Fighter Spirit, it cannot be used in Spirit Battles and is purely aesthetic. Each Fighter Spirit has an alternate version that replaces them with their artwork in Ultimate.
In Spirit battles
As the main opponent