Instructions
Obtain an abounding crystal. These are dropped by Mandrakes in Radiant Gardens and Axe Flappers who can be found in the Coliseum. You can also find abounding crystals in treasure chests scattered throughout the game's levels.
Make sure you are playing as Aqua, as EXP Walker cannot be transferred between characters.
Pause the game and go to the "Command Decks" menu. From here you can use the game's command meld feature.
Combine "Wishing Edge" with "Barrier Surge" and an abounding crystal to create the "Blitz (2)" ability and EXP Walker. Meld "Quick Blitz," Blizarra" and an abounding crystal to create the "Blizzard Edge (4)" ability and EXP Walker.
Combine "Barrier Surge," "Wishing Edge" and an abounding crystal to create "Meteor Crash (3)" and EXP Walker. Put together "Quick Blitz," "Blizzara" and an abounding crystal to create "Poison Edge (3)" and EXP Walker.
Meld "Poison Edge," "Cura" and an abounding crystal to create "Slot Edge (2)" and EXP Walker. Combine "Wishing Edge," "Cure" and an abounding crystal to create "Slot Edge (4)" and EXP Walker.
Combine "Focus Barrier," "Curaga" and an abounding crystal to create "Slot Edge (6)" and EXP Walker. Adding "Blizzard," "Aero" and an abounding crystal creates "Blizzara (4) and EXP Walker.
Meld "Blizzaga," "Mine Shield" and an abounding crystal to create "Ice Barrage (2)" and an EXP Walker. Combine "Blizzaga," "Binding Strike" and an abounding crystal to create "Deep Freeze (1)" and EXP Walker.
Mix "Magnet," "Aero" and an abounding crystal to create "Zero Gravira (3)" and EXP Walker. Meld "Poison," Zero Gravira" and an abounding crystal to create "Blackout (2)" and EXP Walker.
Combine "Sliding Dash," "Magnera" and an abounding crystal to create "Warp" and EXP Walker. Meld "Sliding Dash," "Magnera" and abounding crystals to create "Homing Slide (2)" and EXP Walker.
Mix "Air Slide," Blizzaga" and an abounding crystal to get "Ice Slide (2)" and EXP Walker. Meld "Curaga," "Barrier" and an abounding crystal to create "Renewal Block (1)" and EXP Walker. Combine "Wishing Edge," "Barrier Surge" and an abounding crystal to create "Time Splicer (1)" and EXP Walker.