Basically covering a few more bases. Dig is a ris, but it can be used to my advantage, due to doging most other attacks, and Earthquake can be used to negate an enemy dig. Rock Slide can cause flinchig, so...
Kazuya is my main fighter for water types, due to his grass moves. Giga drain is a quick heal move, fo in case things get.. annoying, and Protect is just in case.
Isa is almost a lastresort, due to her combo of Hail and Blizzard. Mirror Coat can be used to a good advantage agaist certain opponents, and Ice fang, can cause either freezing or flinching
ok, time to work my magic...
Charizard: Looks pretty good, possibly change out dragon pulse for HP-Grass.
Raichu: Also looks good, but a lot of EV's seem to be missing...take whatever's left for him, and pour into special attack.
Swampert: Rock Slide should be replaced with ice punch. And dig should be replaced with either Stealth Rock or Roar.
Sceptile: Terrible. No other word for it tbh. I'm thinking you want more of a special attacker, so try this; Give it timid nature. Make it hold choice specs and give it Leaf Storm, HP-Ice, Dragon Pulse, Focus Blast. Much better set with a LOT better type coverage. Even having 2 moves of the same type is generally bad, but 3...
Delcatty: Again looks pretty good, but shadow ball might wanna be replaced for possibly toxic or twave or Wish.
Glaceon: Again not looking good. Try this set instead: Ice Beam, Wish, HP-Fighting, Protect.
Make these changes and this team will be pretty good =) also consider adding a spinner, due to charizards major weakness to SR, as well as glaceons weakness