You people should really look at the kyu of this kata. It is meant to introduce enumerables to beginners. There are higher kyu katas that explicitly disable native methods to teach other concepts. This is not one of them.

I aggree kitko, those katas teach us how to code stuff like any or all without using those build in methods.

This solution is solution of @bellmyer himself (this Kata's sensei)

I disagree.

The spirit of these <8 kyu> kata is basic language exploration, the description contains a direct link to documentation on enum#any, and nowhere does it state that the use of enum#any is disallowed (nor is it disabled).

The purpose here is to teach beginners about enum#any, not to force more advanced Rubyists to replicate native functionality.