Serious Yugioh Recipe Help!!!!!!!!?

Ok i faced a guy using a beast deck and all of his monsters were 1500 atk and less!!! da only card he had dat was really high atk was green baboon, defender of the forest!!! all i know for a fact dat he had d.d crazy beast, rescue cat, giant rats and the main card dat pissed me off da most... sea koala!!! lol ok i wanna recreate his deck so please... please... someone please create me a 40 card deck dat fits almost all his and can b very competitive!!!