Shellos isn't getting Storm Drain?

I’ve been breeding for a 4IV male Shellos (West Sea) with Storm Drain. So far, out of ten eggs, none of the baby Shellos have had Storm Drain! I checked, and Storm Drain isnothis Hidden Ability. Normally I would put it down to the RNG, but I would assume that out of ten eggs at least one of them would have Storm Drain. But nope, just Sticky Hold. Is this just bad luck, or is there something I’m missing?

Pleaselog inorregisterto add a comment.

EDIT: After reading your most recent comment, I am forced to conclude the RNG simply dislikes you. I apologize, but you’ll get it eventually!

So I have two theories.

The first operates on the following principles:1) You are breeding Shellos with another non-Ditto species2) The mother Shellos has Sticky Hold.If so, here’s the reason why: (from Bulbapedia)> Starting in Black 2 and White 2, there is an 80% chance that the Ability slot of the female will be passed to the baby. For example, when breeding a female Pinsir with Hyper Cutter, the resultant Pinsir has an 80% chance of having Hyper Cutter rather than Mold Breaker. This chance does not apply if Ditto is used as either parent.

If not, then the RNG simply hates you. And I have had similar experiences, I’ve gone through boxes of Pumpkaboo without a single one with Frisk.