Tales of Symphonia Unlockable Alternate Costumes

Unlock Colette-fair lady costume: Complete Princess Guard Sidequest
Unlock Colette-Maid Costume: Talk to the two girls in Meltokio castle
Unlock Colette-Mermaid Costume: Complete Altamira Child Find Sidequest
Unlock Genis- Easter sunday: Complete princess Guard Sidequest
Unlock Genis-Beach Boy Costume: Complete Altamira Child Find Sidequest
Unlock Genis-Katz katz katz costume: Complete katz katz Katz Sidequest
Unlock Kratos-Judgement: If u chose Kratos over Zelos at Flanior then when you get to the part where Lloyd gets the Material Blade Kratos will join your party and have it
Unlock Lloyd-Beach Boy Costume: Complete Altamira Child Find Sidequest
Unlock Lloyd-Nobleman costume: Complete Princess Guard sidequest
Unlock Lloyd-Pirate Costume: Agree to Aifread%u2019s Sidequest
Unlock Presea-Klonoa costume: talk to George in Altamira
Unlock Presea-Little madam Costume: Complete Princess Guard sidequest
Unlock Raine-maiden Costume: Walk up to the Wind dais in Asgard
Unlock Sheena-Successor Costume: Talk to Sheena%u2019s grandfather in Volt%u2019s Temple
Unlock Sheena-You look great Costume: Complete princess Guard sidequest
Unlock Shhena-Queen of the Beach Costume: Complete Altamira child Find Sidequest
Unlock Zelos-Masked costume: simply walk to zelos%u2019 house

Tales of Symphonia Unlockable Game mode

Completion bonuses: Successfully complete and save the game, then reload the cleared game file. The %u201CGame Record%u201D, %u201CSound Test%u201D, and %u201CMania%u201D options will now be unlocked at the title screen. Also, go to the Grade Shop to access new items.

Game Record: at the title, simply beat the game once.
Grade Shop: After clearing the game once, load the clear data, then you will be able to buy stuff such as Max HP Increase, Exp*10, Exp*2 with Grade.
Mania Difficulty: simply beat the game once.
Unlock Aviation: Collect the nine Darkness Weapons and go to the Darkness Temple.
Unlock Modes: Complete and save the game to unlock the game record, sound test, and mania options.
View All Skits: Beat the game, then talk to the mayor of Katz%u2019 Village.

source article from :  Tales of Symphonia Cheats GameCube