This is a playthrough using Onslaught in 1-player Battle mode in the PS1 version of Marvel vs. Capcom. Read on below for his moves and more information...
Onslaught is the one and only boss of this game, and comes in 2 forms. He is an unlockable playable character.
===== Additional Information =====
---- If you complete the game with Onslaught, you'll get a generic hidden character ending.
---- When playing as Onslaught legitimately, you'll always be locked onto the 'Rooftop By Central Park' boss background.
---- Only one side can be Onslaught.
---- His 1st and 2nd forms are programmed in as one character. To access his 2nd form, you need to lose with his 1st form.
---- No matter who the opponent is, Onslaught's BGM always seems to play.
---- On the character select screen, his character slot is below Wolverine. When you highlight this slot, you don't see Onslaught until you press a button to select him.
---- When playing as him, unfortunately you do not get his boss intro dialogue with the opponent nor the intro music.
---- When playing as Onslaught In Battle/arcade mode, he does not fight Onslaught at the end. Instead, his last boss on Stage 08 is a random selection of the game's hidden characters.
---- As 1st form Onslaught, if you use his Partner Switch move, he'll switch out of the fight and his "partner" who comes in will always be a clone of the opponent. This is because of the PS1's hardware limitations, meaning that it cannot handle more than 2 characters being loaded in the VRAM for a fight.
---- When Onslaught is controlled by a Human player, his more powerful moves (such as the Mega Laser) become his super moves which actually require the super gauge.
---- When Onslaught is controlled by the CPU, he acts just like the boss Onslaught, meaning that his more powerful moves are his normal moves without needing the super gauge!
---- The player version of Onslaught does not have the "beam super get-out" move. This is the move where when CPU Onslaught is being hit by a beam Hyper Combo (for example Morrigan's Soul Eraser), he gets out of it by teleporting during the hits.
---- As you can read above, the human player version of PS1 Onslaught he is vastly different to the player version Arcade Onslaught. On the arcade version, the player (using alternate methods) gets to control the true boss Onslaught.
---- The CPU 2nd form Onslaught has a move where he blasts the laser 4 times. The player version of him does not have this move.
---- The Japanese version of the game is known as Marvel vs. Capcom: EX Edition.
===== About Onslaught =====
Powerful Marvel comic villain who I believe is a combination of Magneto and Professor X. I do not have much knowledge of Marvel stuff, but I imagine this guy is evil.
Gameplay-wise, I find it a shame that Capcom made the player version of him different to the CPU version.
===== About PS1 Marvel vs. Capcom =====
As with the previous two Vs. games, due to the RAM limitations of the PS1 hardware, huge cuts needed to be made in porting the arcade game to the console... and the main cut is the fact that you cannot switch characters during a fight. Therefore it operates more like a traditional one-on-one fighter, consisting of separate rounds. Tag elements such as the Support move, Counter and the Team Super Combo are still possible though.
Capcom have also included a mode called Cross Over which actually allows character tag-team switching - with the drawback being that 1P and 2P side's characters will always mirror each other. So for example, if Player 1 chooses Ryu and Spiderman, Player 2 will also have Spiderman and Ryu. By doing this it makes the tag-team switching possible because technically only 2 characters are stored in the PS1's RAM.
Other drawbacks include animation sprite frame cuts, making some moves look a bit choppy/jerky.
New features includes the ability to cancel Special Moves into Super Combos, and Super Combos into another Super Combo.
