Because I felt like it. And people keep giving me stupid questions.

Because Sega wanted to give out trophies as some sort of reward at special events, however this was quickly found out and people spread them around. They never gave any of these out because of that reason.

*audible groan*
It's what ever key you bound as your select button.

*bigger audible groan*

204 390 Modern Sonic
171 045 Classic Sonic
632 951 Modern Tails
359 236 Classic Tails
863 358 Amy
679 417 Knuckles
332 955 Cream the rabbit
888 200 Rogue the bat
894 526 Espio the Chameleon
544 873 Blaze the Cat
868 377 Vector the Crocodile
226 454 Charmy Bee
629 893 Chao
870 580 Omochao
613 482 Modern Dr Eggman
103 729 Classic Dr Eggman (Robotnik)
277 087 Metal Sonic
262 416 Shadow
688 187 Silver
353 012 Big the Cat
601 409 E-123
383 870 Jet the Hawk
507 376 Hero Chao
869 292 Dark Chao
309 511 Chip

483 990 Moto Bug
852 363 Buzz Bomber
363 911 Crab Meat
639 402 Chopper
275 843 Grabber
466 913 Spiny
360 031 Egg Robo
640 456 Cop Speeder
530 741 Spinner
668 250 Gun Hunter
975 073 Gun Beetle
125 817 Egg Pawn
872 910 Iblis Biter
513 929 Iblis Taker
711 268 Iblis Worm
851 426 Egg Fighter
973 433 Egg Launcher
329 494 Aero-Cannon
200 078 Egg Chaser
548 986 Sand Worm

070 178 Spring
537 070 Spring 2
209 005 Item Box
777 921 Capsule
933 391 Goal Plate
283 015 Goal Ring
390 884 Ring
008 140 Chaos Emeralds
495 497 Booster
249 651 Animals (Cucky/Pinky/Flicky/Pecky)