As far as I remember about TLK 2, there may be behavior inconsistencies here, and it seems his behavior from TLK 1 was followed more closely in 1 1/2, even though that TLK film is about my fav, Timon.
Apparently though, his "craziness" seems to have spun off onto the process of helping them, to Simba in this TLK film and to Timon from TLK 3.

For further insight, take a look at this TLK 1 scene of him, from YT

And just for laughs, this one

http://youtu.be/MGk-lrg-318