
Many platforms had their textures changed from yellow to blue in the GameCube version. :70 Sonic Team had used a similar virtual pet system, the "A-Life", in Nights into Dreams Iizuka used the A-Life as a base, while improving it with the VMU and the option to improve its skills.

A number of textures in the first section were made slightly darker in the GameCube version. The Warp Hall was given a number of texture changes in the Gamecube version. Sonic & All-Stars Racing Transformed (2012), Mario & Sonic at the Olympic Games Tokyo 2020, Mario & Sonic at the Rio 2016 Olympic Games, Mario & Sonic at the Sochi 2014 Olympic Winter Games, Mario & Sonic at the London 2012 Olympic Games, Mario & Sonic at the Olympic Winter Games (2009), Mario & Sonic at the Olympic Games (2007), Sonic Chronicles: The Dark Brotherhood (2008), Sonic Adventure DX Director's Cut - Gamecube, Sonic Adventure DX: Director's Cut - Gamecube, Sonic Adventure DX: Director's Cut (GameCube)/Changes from the Dreamcast Version, Sonic Adventure Original Sound Track (Digi-Log Conversation), Sonic Adventure: Songs With Attitude Vocal Mini-Album, Sonic Adventure Original Soundtrack 20th Anniversary Edition, Passion & Pride: Anthems with Attitude from the Sonic Adventure Era, Sega Mega Drive Classic Collection Vol. When both are captured, Amy convinces Gamma not to work for Robotnik, who helps her to escape, before seeking out and destroying the other robots in his series, sacrificing himself in the process. The design took considerable time to finalize and had to be made as simple as possible because the virtual pet's look changes form as it evolves. Part of Twinkle Park in the GameCube version. Loading times are significantly shorter than in the Dreamcast version. The second section was given more fog and is overall less shiny than in the Dreamcast version. The weakened collision at the beginning of the third section makes it possible to skip the snowboarding section in the GameCube version. In addition to its reworked visuals, Sonic Adventure DX adds multiple features not present in the original Dreamcast release. The walls in this area are lined with trees in the original version. The train used to transport from Station Square to Mystic Ruins is now blue instead of red as in the Dreamcast version. These features were added to appeal to players of the original game. , On October 4, 1999, Sega announced that a sequel to Sonic Adventure was in development. Some minigames can only be accessed with particular characters. The map was updated to match the redesigned base.


The textures in the walls of the main area and the shower room were changed in the GameCube version. Neither Big nor Gamma were intended to play a large role, thus both of their campaigns were short. This version of Sonic Adventure contains several exclusive features and various changes. The buildings around City Hall were also given redesigns. The palm trees with Kikis on were made shorter in the GameCube version.
