Hint #1: Some costumes can do a strong hit. Press "A" just before Mel or Dio is going to Attack, and if a little smiley face has shown up, you've done the strong hit.
NOTE: This works for ONLY Mel and Dio, with ONLY some costumes.
NOTE 2: Only the person who is currently the "Leader" can do the strong hit.

Hint #2: Be sure to stop and gain levels every once in a while, because the bosses get very hard later in the game. Also, it is a good opportunity to master a varity of costumes.

Hint #3: Try mixing a lot of costumes to get different powers.

Hint #4: Do a lot of events. You can get costumes/ or money from most of them.

Hint #5: Always have food in your food sack, because for each 1 piece of food, you get 1 HP for every character every step you take.

Hint #6: The Dhaos Costume for Dio makes a great threat to the "Usapyon" monster. The Dhaos Costume's move "Tetra Spell" hits 4 times in one attack, so you can do 4 damage to her just like that. Also, the "Kengou" costume on Dio CAN do 2 damage if you do the strong hit.

If you have any "Tales of Phantasia: Narikiri Dungeon" Tip(s), Hint(s), or Secret(s) you'd like to submit,
let me know on the Message Board.