Crash Twinsanity

Crash Twinsanity was the second game in the main series starring Crash Bandicoot to be released on the Playstation 2 and the Xbox. This is the eleventh crash bandicoot game, but the fifth chronologically, following the events of Crash Bandicoot: The Wrath of Cortex. Unlike previous games in the series, this game introduces a free-roaming game world. All the characters in this game had 5 fingers.

Story
This is the first game where you play as Cortex and Crash together. It begins with Coco Bandicoot chasing a butterfly through the jungle when Cortex then stuns her and then puts on her clothes to disguise himself as her. Then he lures Crash into an area that Cortex calls a birthday party with most of the previous enemies from the series like Dingodile, Pinstripe Potoroo, Tiny Tiger, Crunch, Nitros Oxide, Polar, Ripper Roo, and Koala Kong, and reveals himself makes out that he has organised a 'birthday party' with the exact opposite (like using bombs as presents). But, Crash defeats Cortex and N. Gin riding in Mecha Bandicoot. He and Cortex then go into a rollerbrawl through the mines and encounter the aliens called Ants for the first time. After they exit the mines, the Evil Twins, Victor and Moritz, mutant parrots from the 10th Dimension tell them they are going to destroy N. Sanity Island. Cortex then gets attacked by bees and is saved by Crash, only to be kidnapped by Papu Papu's tribesmen so that Crash has to save him again! After the escape, they encounter the Evil Twins again, and they bring to life a statue called Tikimon which the duo manage to defeat. They then go to Cortex's iceberg lab, where they meet Uka Uka. He is very angry at them and creates a huge block of ice to destroy them. After his block of ice is melted, Aku Aku convinces Uka Uka that the Evil Twins must be stopped.

At about this time, Dingodile tells N. Gin, Nefarious Tropy, and Nitrus Brio about the Evil Twins' treasure room (having learned by overhearing a complaining Cortex), and the four decide to stop Crash and Cortex. The latter three attack Crash on N. Gin's battleship and fail. Crash obtains a Power Crystal, but Coco thinks he has been kidnapped and breaks Them. Crash and Cortex then go to Madame Amberly's Academy of Evil to get Cortex's niece Nina and hopefully save the Power Crystals. Dingodile himself attempts to confront Crash, but it doesn't work. However, Madame Amberly insults Cortex and is attacked. Eventually she falls into a tank of acid under the classroom. Nina gets away and follows Crash and Cortex to the 10th Dimension, along with the Mechabandicoot robot mentioned earlier. They don't know this, but N. Gin, N. Tropy, and N. Brio have followed them there, along with Aku Aku and Uka Uka. Nina, Cortex, and Crash power up Mechabandicoot. Evil Crash kidnaps Nina but is captured by Cortex. Meanwhile, the group lead by N. Tropy fails to steal the Evil Twins' treasure since Spyro intervenes. Nina, Cortex, and Crash Bandicoot finally destroy a robot built by the Evil Twins.Back In This Demension Cortex decides to use this time to send Crash To The 10th Demension With the Psychotron. but it malfunctions and causes Cortex to be abducted and shrinks him which causes him to fall into Crash's ear and onto his brain where he finds Crash clones dancing to music causing Cortex to go insane. Meanwhile, Evil Crash mistakes the Evil Twins for roast chicken and eats them.

N. Sanity Island

 * Jungle Bungle (Crash)
 * Boss: Cortex (Crash)
 * Boss: Mechabandicoot (Crash)
 * Cavern Catastrophe (Crash & Cortex: Roller Brawl
 * Mini boss: Ants (Crash)
 * Totem Hokum (Crash & Cortex: Doc-Amok)
 * Totem Hokum (Crash)
 * Natives & Papu Papu Chase (Crash)
 * Boss: Tikimon (Crash & Cortex: Cortex Toss)

Iceberg Lab

 * Ice Climb (Crash)
 * Ice Climb (Crash & Cortex: Cortex Toss)
 * Boss: Uka Uka (Crash & Cortex: Cortex Toss)
 * Mini-boss: The Ants (Crash & Cortex: Cortex Toss)
 * Slip slide icecapades (Crash & Cortex: Humiliskate and Roller Brawl)
 * High Sea Hi-Jinks (Crash)
 * Mini-boss: N. Gin (Crash)
 * Rusty Walrus Chase (Crash)
 * Boss: Dr. Nitrus Brio & Dr. Nefarious Tropy (Crash)

Academy of Evil

 * Boiler Room Doom (Crash & Cortex: Cortex Toss)
 * Boss: Dingodile (Crash)
 * Classroom Chaos (Crash)
 * Classroom Chaos (Cortex)
 * Rooftop Rampage (Nina)
 * Boss: Madame Amberly (Cortex)

Twinsanity Island

 * Rockslide Rumble (Crash & Cortex: Humiliskate)
 * Bandicoot Pursuit (Crash & Cortex: Doc-Amok)
 * Ant Agony (Crash)
 * Boss: Evil Twins (Nina)
 * Boss: Evil Twins (Cortex)
 * Boss: Evil Twins (Mechabandicoot)

Hints

 * After you get to the chamber after the up-going drill on area 3 on level 1 (Cavern Catastrophe), there are some smashable boxes in front of you. Throw Cortex over them and jump on the crates and go next to one of the TNT creats. Cortex will return and be next to it. Now turn the timer on the TNT crate on the other side. Go gather the wumpa (without going any further, Cortex will laugh and run away if you do). After the wumpa is gone, jump on the TNT crate (as long as Cortex is next to it) and wait for it to blow up. Cortex will be killed, but you can get the wumpa with Crash. Get the wumpa before it turns black. Don't worry, you won't lose a life if Cortex is killed. Repeat as often as you like to get lots of lives.
 * Right after you get out of Cavern Catastrophe, there are 2 sets of 4 boxes floating in the air. Jump down and you will see a worm. Jump up and you will see Cortex in a farm with a bird. Jump over the fence and walk up to Cortex. You will have skipped all of Totem Hokum except for the boss.
 * How to get the extremely hard Yellow Gem in Slip Slide Icecapedes: At one point just before you turn into a giant snowball, ride the right side of the screen. You will see a purple pipe at the end of the cliff-thing you are on. Turn left onto the pipe, DON'T JUMP. If you jump, you will miss the grind. You must do this slowly. This is considered to be the hardest gem in the game.

Trivia

 * Both Bandicoot Pursuit and bee swarm level's music is a remix of flight of the bumble bee.
 * Polar seems mad at Crash for some reason.
 * This game introduced many makeovers for most characters at Crash's birthday party, like Tiny, Pinstripe, Koala Kong and Dingodile but some stayed the same
 * In Crash of the Titans, the one of the voodoo rabbits says: "Me think he (Uka Uka) do something crazy. He very self-conscious about being no-body bad guy. He had body briefly in Twinsanity, but that was no fun for nobody", if you don't attack them/they don't see you.
 * In one cutscene, Cortex mentions that The Wrath of Cortex didn't do as well as expected.
 * The Rusty Walrus Chase theme is a remix of Hebrides Overture.
 * In the Worm Chase scene where you have to save Cortex from the tribemen's music is a remix of The Blue Danube Waltz Theme.
 * In the cutscene right before Crash fights Cortex, Cortex mentions he spent 3 years ALONE in Antarctica, but at the end of The Wrath of Cortex, it's him and Uka Uka in Antarctica
 * When Coco kicks Cortex and the power crystals get broken, he remarks in agony, "My...crystals...!" But he might actually be referring to his genitals since he's looking between his legs and Coco kicked him in the crotch.