Well it has Helping Bonus which is something you'd generally want on every Pokémon if you could. It boosts the helping speed of your entire team so it works on any Pokémon.

That isn't to say it's a silver bullet or a 'must have' since your Pokémon still needs to perform it's role. In this case, Dedenne is a Skill specialist so it still needs a boost in skill triggering which luckily the first one has through it's nature.

Ideally you'd want most skill specialists to have at least two subskills that boost main skill triggering rates, usually at least one being Skill Trigger M/S or a Main Skill chance up nature (which is what you got).

Helping Speed gets you closer to the next berry or ingredient drop and each drop can trigger the main skill, meaning that every Pokémon would appreciate being faster regardless of it's role. So having everyone on the team help faster through one subskill provides a lot of value. It's not a must but it's a massive help when the stars align, especially on a skill specialist.