Why does Oceanic Operetta have a base power of 195, while the other two only have a base power of 180?

Question

Primarina's Z-move Oceanic Operetta has a base power of 195, while Malicious Moonsault and Sinister Arrow Raid both have a base power of 180. Is this just a case of Gamefreak favoring water types, or is there a more obvious reason?

Comments

Spirit Shackle's BP is 80, and Darkest Lariat's BP is 85, so without the exclusive Z-moves, these two moves would have a Z-move BP of 160 if powered up by a Ghostium Z or Darkinium Z. However, Sparkling Aria has a BP of 90, so when powered up by a Waterium Z, its Z-move BP becomes 175. The exclusive starter Z-moves have a 20-point difference from what they would have if powered up by a Ghostium Z, Darkinium Z(160+20=180), or Waterium Z(175+20=195), so this could be it.

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^^^^^^

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Does this count as breaking rule 1.4?

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I don't think so because there's a plausible answer to it

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Question: do Z-moves keep the past moves extra attacking effects effects?

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Status Z-moves do. Attacking Z-moves don't.

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@risingmanectric your answer is most likely right, as the same question could be asked about why Primarina's Sparkling Aria is more powerful than Darkest Lariat and Spirit Shackle.

Answer 1

Spirit Shackle's BP is 80, and Darkest Lariat's BP is 85, so without the exclusive Z-moves, these two moves would have a Z-move BP of 160 if powered up by a Ghostium Z or Darkinium Z. However, Sparkling Aria has a BP of 90, so when powered up by a Waterium Z, its Z-move BP becomes 175. The exclusive starter Z-moves have a 20-point difference from what they would have if powered up by a Ghostium Z, Darkinium Z(160+20=180), or Waterium Z(175+20=195), so this could be it.
commented Jul 27 by -RisingManectric-

It's most likely because Sparkling Aria is more powerful than Darkest Lariat and Spirit Shackle