Unleashed
As mentioned in my introductory post to the HeartGold & SoulSilver Series, I am assuming the Pokémon LEGEND to still be 3 per box, the Pokémon Prime reduced to 5 per box, and the secret rare (Alph Lithograph TWO) reduced to 1 in 6 boxes. If this guess is correct, it would make this the rarest category of card so far, though not the rarest individual card (the Gold Stars were usually about 1 in 3 boxes, but there were 2 or 3 of them in each set). The rarity table for Unleashed looks as follows:
The raw data for the rares, Pokémon LEGEND and Pokémon Prime looks as follows (since there are 11 holos in the set, I am assuming they all have the same rarity; the raw data gives no indication of it being otherwise):
(The dashed lines, as usual, indicate where the transition from R8 to R7, etc., would occur.)
There don’t appear to be any artificial rarity differences, and Steelix and Tyranitar, the two rares included as holofoil cards in the theme decks, certainly don’t appear any rarer than the other rares.
I did look at the reverses for this set, and my best guess is all 28 reverse uncommons as well as 10 reverse commons were printed twice on the sheet:
One final thing which applies to the sets from this series in general and which I haven’t mentioned so far is that Pokémon Prime can appear both in packs with holos and with non-holo rares, but don’t typically appear alongside a Pokémon LEGEND.
Edit 2023/8/8: Corrected the rarity table (old version incorrectly still had 6 Pokémon Prime per box instead of 5).
Edit 2023/09/09: Changed sheet size of Pokémon Prime to 10x11 (see introductory post on HeartGold & SoulSilver Series above)
Edit 2023/11/19: Changed sheet size for Pokémon Prime in model to 10x10 (see introductory post)