Speedrun decided to Shroomy. I got World Record because I learned the missing strats like Metropolis 1 Glitch and Oil Ocean 2 WR Boss Strat, except Aquatic Ruin 2. I really feel that playing with Sonic & Tails in Sonic The Hedgehog 2 Absolute is not very useful, because there are no very specific strats except Chemical Plant 2 and Metropolis 3 Boss. Also the lack of glitches like the boss skips in Hill Top 2 and Oil Ocean 2.