Final Form

A Final Form is a type of Final Smash where a character transforms into a stronger one with a full moveset and can be controlled as a normal character.

The Final Form's moves are more powerful than the regular ones, some are even infused with a certain element of the character transformed, for example: the Star Spin of Mario turns into a fiery version when he transforms into Fire Mario, thus becoming the Firewall Star Spin. They also gain completely different attacks and special moves to improve them. These character take less damage and have knockback resistance, which makes them hard to KO. During the transformation a special tune that matches the Final Form could be heard; for example, the Super Sonic's theme from Sonic the Hedgehog 2 will be played once Sonic is transformed.

In a normal battle, the transformation time is measured with a small yellow bar that appears above the character's damage percentage counter. Once it is empty, the character will return to his normal form.

Trivia
For some final forms like Kyubi Naruto, Bankai Ichigo or Super Saiyan Goku, the transformation can also do damage to characters near them.

Semi-Final Form
There is another type of Final Smash similar to the Final Form, crowned as a Semi-Final Form. A Semi-Final Form also involves the character transforming, however, the character turns into a form whose moveset is not complete and is usually limited to about three attacks. Few of them also gain the same knockback resistance regular Final Forms get.

External link

 * Final Forms' page at the Smash Flash DOJO!!