These must be don while Tak is following the yellow spark with the word Loading underneath him

Big/Small head;
Press the c (control) stick up (bigger) or down (smaller)

Slow-mo;
Press the a button for as long as you want him to run slow

Tip-Toes;
Done exactly like sm, but you need to press b instead

Slow-mo Tip-toes;
Press a and b at the same time.