A chain capacity meter replaces the TP stat. See the number 5 in the screenshot? That’s the CC meter. It drops after each attack, a point for a basic hit or three if you do a special move like Gengetsuga where Keroro temporarily transforms into a samurai.
Each attack fills up the blazing rise meter, the blue bar underneath the HP meter. When the BR meter is full you can press L and activate a mode where you can attack relentlessly without worrying about your CC meter.
I tried a demo of Keroro RPG’s system and aside from the lack of TP it feels just like a Tales game. Seeing Keroro leap into the air for a multi-hit spinning sword slash called F-hornet is pretty amusing too. This frog can fight. You can switch to Keroro’s allies by opening the menu and pressing L to change characters. Kululu acts like a magic user armed with cure spells and magic missiles which he can fire out of a DS-like device.