One Piece: Gigant Battle 2 - Shinsekai
Robin's, Franky's, and Brook's pre-timeskip's second support attack
Reach level 3 with one of the following characters in Story mode to unlock their pre-timeskip's second support attack. Robin's second attack is "Wing", Franky's is "Ballad" and Brook's is "Yahazugiri".
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Thousand Arena 1 vs. 100 challenge
Complete the Thousand Arena Battle Royale and One To One challenges under the Shin Sekai difficulty setting five times each with different characters. The 1 vs. 100 challenge is a series of 100 short fights where you participate alone. You also cannot recover between each fight, however you will get a piece of meat after every ten victories.
Thousand Arena Shin Sekai difficulty
Complete the tournament under the Grand Line difficulty setting with five different characters. You can now play the Thousand Arena Battle Royale and One To One challenges under the Shin Sekai difficulty.
Complete the indicated task to unlock the corresponding character.
- Chopperman: Complete Thousand Arena One To One with 45 characters.
- Neptune: Connect to Nintendo WFC and select "Download Content" to unlock a secret Story Mode level, then complete it.
- Shirahoshi: Connect to Nintendo WFC and select "Download Content" to unlock a secret Story Mode level, then complete it.
- Soldier Docking Emperor: Complete Thousand Arena Battle Royale with 45 characters.
- Main character support versions: Execute all character moves in Training mode; alternately, complete a Thousand Arena tournament with the desired character.
Strategy guides from GameFAQs