Max Chakra Skills
First open up Explorer and navigate to your saved games folder. Open the folder that contains the saved game you're currently playing and look for a file called "global.gs". Open it up with notepad and search for the following strings

(Note: replace any number after the string to indicate the level of your chakra skill. The max level for any skill is 4, so don't go above that or it'll get bugged).

Example:
Change "skill_level_red0" to "skill_level_red4" in order to get level 4 Combo skill.

skill_level_red2 Aim
skill_level_green0 Astral
skill_level_brown0 Attack Dmg +%
skill_level_brown1 Attack Dmg +%
skill_level_brown2 Attack Dmg +%
skill_level_brown3 Attack Dmg +%
skill_level_red3 Avoid
skill_level_orange1 Charm
skill_level_red0 Combo
skill_level_yellow0 Curse
skill_level_yellow3 Drain
skill_level_green2 Focus
skill_level_green1 Heal
skill_level_yellow2 Read
skill_level_red1 Rush
skill_level_yellow1 Slow
skill_level_orange0 Spook
skill_level_green3 Strike
skill_level_orange3 Stun
skill_level_orange2 Summon

Infinite Points/500 score
In the village of Lanuevo, activate the quest where you must get the Senastille and Kongsun couple together. When you find the father of the Kongsun woman, talk to him repeatedly to keep gaining points.