There will be at least one point in the series where Ash will have three of his six Pokemon equipped with moves that do recoil to the user, plus one who has the similar but not identical "has to recover after doing the move".
This is a surprisingly sound strategy in the anime, considering one of the criteria for a true shonen protagonist is the ability to do a move that hurts, tires, or can potentially kill the user, and yet never suffer any significant consequences. Stupid Heroic Willpower.
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You should get at least one alt in the event you get warned or put into Purgatory. - Luster
It's probably easier to just not break the rules. - SmartMuffin