Disney's Lilo & Stitch 2: Hämsterviel Havoc is the only tie-in game to Lilo & Stitch: The Series, and a standalone sequel to the 2002 GBA game based on the original film. Like that game, this game is a Shoot 'Em Up Platform Game, albeit with some puzzle-platforming segments in Lilo's levels, and driving segments on some of Stitch's levels. It was developed by Climax Studios and first released in North America on October 12, 2004, between the two seasons of The Series.
Not to be confused with Lilo & Stitch 2: Stitch Has a Glitch, which was released the following year.
Tropes relating to Hämsterviel Havoc include:
- American Kirby Is Hardcore: The American (seen above) and European◊ covers show a slightly vicious Stitch in his Experiment 626 form and spacesuit firing three plasma blasters towards something off-screennote with Richter (X-513) and Spooky (X-300) in the shadowy background, with a crosshair around the 2 on the American cover. The Japanese cover◊ shows a more neutral "dog form" Stitch just pointing a plasma blaster at the viewer with five of the game's experimentsnote scattered across the light floral pattern background, with stylized flowers and palm fronds around the logo.
- An Ice Person: Slushy (X-523) can be played in Lilo's levels to freeze enemies and water, cool down overheating machinery, and put out fires.
- Antagonist Title: Game and franchise antagonist Dr. Jacques von Hämsterviel provides his surname for the subtitle, but only for the American release.
- Caffeine Bullet Time: If Stitch drinks a cup of coffee, he will become so hyperactive that everything else in the level slows down, making it easier for him to dodge plasma fire and fire back at enemies.
- Covers Always Lie:
- Regarding the U.S. and Europe cover, Stitch does not wear his spacesuit in the game, nor does Spooky (X-300) ever appear.
- The Japanese cover mostly averts this trope, but it depicts Stitch in his two-armed disguised form. He is always shown in his four-armed true form in gameplay.
- Defeat Means Friendship: Stitch has to defeat some of his cousins again to snap them out of their evil trance.
- Earthquake Machine: Richter (X-513) can slap his tail to cause an earthquake that brings down rock walls in the way.
- FaceHeel Turn: The plot begins with some experiments suddenly causing evil again, prompting the Galactic Federation to get involved. Jumba determines that Angel (X-624) has caused this to happen via her siren song.
- Good Versus Good: Lilo and Stitch are on the good side, but they have to defeat United Galactic Federation troopers who have been sent to stop the experiments who have suddenly become evil again in order to save said experiments.
- Hyperactive Metabolism: Health bars are restored by eating ice cream (one bar) or cake (three bars). Justified for Stitch due to his superpowerful artificial alien nature and voracious appetite, much less so for the human girl Lilo.
- Magma Man: Yang (X-502) can fire balls of lava at enemies.
- Make Me Wanna Shout: Yaarp (X-613) can be called out to deliver sonic blasts.
- Market-Based Title: The game was released as just Disney's Lilo & Stitch 2 in Europe (which made the release of Stitch Has a Glitch there all the more confusing) and Disney's Lilo and Stitch (without the ampersand) in Japan. (The Japanese never received the first GBA Lilo & Stitch game.) In addition, the title screen of the Japanese version adds The Series to the title, emphasizing the game's basis on the show.
- Oddly Named Sequel 2: Electric Boogaloo: Name and Name 2: Antagonist Alliteration
- Racing Minigame: Replacing the tube shooter segments of the first Lilo & Stitch GBA game are Mode 7 driving levels where Stitch must drive the X-Buggy to get to his next destination, fending off enemies along the way.
- Series Continuity Error:
- In some cutscenes, Yang (X-502) is misidentified as Experiment 501, which is his partner Yin's number.
- The game has the characters refer to experiment pods as "experiment balls" for some reason.
- Wingdinglish: The Tantalog-speaking experiments have their speech rendered as this, especially since the text is too small to decipher on their own.