The Animation in the Sonic Advance Games

How did Sega and Dimps nail the animation in the Sonic Advance games? CHAPTERS: 0:00 - Intro 1:04 - Technical Stuff 8:54 - General Fundamental Stuff 12:22 - Personalities 13:14 - Idle Stances 15:51 - Build up Animations 18:03 - Running 20:15 - Breaking 21:26 - Patterns 22:11 - Combined Animations 22:58 - Relativity 24:10 - Fun Details 25:27 - Conclusion 28:21 - Missing Elements 28:49 - Super Sonic 29:39 - Indie Game Highlight 30:18 - Loveyoubye RESOURCE: - balancing animations - dancing animations - Sonic Battle powering up - Idle animations - more idles - stopping animations - pu