The effect that i would like to recreate is just the beginning of the animation. My first thought was to do it with the scribble effect, i've tried it but it didn't work. Could someone point me in the right direction? Is it with an expression or just an effect?
an easy way is to use the old (obsolete) path text effect.
in the advanced settings (at the bottom of the effects settings) are settings for 'jitter'. adding just a little jitter to some of those properties should get the character to wiggle around like the opening text effect in the sample.