Sonic:

you usually join in the 100m race but you also join in against whatever shadow's kid is in so you can beat them.

Tails

you dont join in much but when you do you join in batmintion, table tennis or the javelin throw.

Amy

Karate, Swimming, archery and Equestrian, some times Canoe with Infanate's kid

Eggman

you compete in everything to beat everyone.

Infanate

you dont partipate but you cheer on everyone (until amy's kid takes you the water based sports)

Sliver

You do the most dangerous of them all...  you do Achery.  thats it. and the 100 relay race, and Football(like soccer foot ball)

blaze 

you love Gymnastics, karate  and badminton you rarely play but you also do climbing if your mom is.

Shadow

Boxing, discus throw, triple jump, and Canoe with your dad.

Knuckles

Diskus throw, Javein throw, Relay race 100m, fenceing, and many many others (as long as its against someone else.

Rookie

you dont you cheer everyone one next to Infanate's kid (but you  will sometims join in on the 4 person relay race if anyones lacking

MS

you usualy join in with Tail's kid  (mostly because you have a crush on them Rana has been shiping for a while.)

espio

You have been banned from the non water sports and a the triple jump. i'm not gonna tell you how  but you somehow did.