Woof! Well, back to this again. With the closing of the gaps to fairer levels... Hmm...
So the scaling kinda goes off-kilter there. Generally we don't treat power levels as linear, which makes sense because until Frieza's final form, power levels aren't 1-to-1. Yet at the same time, the scaling page is pretty screwy about it.
See, Nappa's power level is 4,000, which would go up to 40,000 with the Oozaru transformation. That in on itself translates to >1.8 ronnatons. Yet, Goku, whose power level is predicted to be 60,000 by Ginyu (it actually winds up being 90,000) is also >1.8 ronnatons. Yet at the same time, Vegeta, whose power level is 18,000, transforms into an Oozaru, which in turn increases his battle power to 180,000... Which is the same level Goku reached when using a basic Kaio-ken in front of Ginyu... That rating equated to >3.6 ronnatons, and... Well, the Kaio-ken boost noticeably freaked Ginyu out.
While the power level ratings and the AP scaling page are hardly comfortable ratings, Kirby's AP rating sits at a comfortable 4.63 ronnatons, which is far above the 3.6-ronnaton rating that Ginyu is freaked out over.
But I don't think this entirely quashes the Ginyu force. This should once again make the previously suggested strategy of combining Guldo's psychic hold with Ginyu's own power. This is, once again, due to Kirby's pretty lousy lifting strength rating compared to the Ginyus. However, I feel that this will have a different end result in mind. See, when Ginyu sees a body more powerful than his own, his favorite tactic is to switch bodies. Given Kirby's noticeably higher power level, Ginyu would inevitably want to try that.
I should point out that Ginyu's power is a double-edged sword. See, when Ginyu took over Goku's body, Ginyu took a harsh hit in power level, going from his own power level of 120,000 to a measly 23,000. That's pretty harsh especially when you consider the wiki translates that to somewhere between 360 and 540 yottatons. However, in Dragon Ball Super, his body-swapping tactic worked more in his favor, as after switching bodies with Tagoma, Ginyu became far stronger than Tagoma ever had been.
What makes this screwier is Ginyu's idea of battle power is raw power as opposed to how we treat power which takes into account for practically everything (AP, speed, lifting strength, and durability). This would, in turn, make it so that Kirby would gain Ginyu's lifting strength, although the body swap ability would take away Kirby's ability to inhale, and eight inches isn't exactly anything Kirby can eat since, last time I checked, a walking pink puffball isn't food.
So where would this put things? Well, the best answer for this would be Inconclusive as there are too many variables in the Ginyu Force's ideal combat strategy to reliably determine whether they'd win or lose.
