After reading a few days back in this thread that someone got a Grass Knot TM via Pickup, I decided to import some cloned high level Linoones from Emerald to do some tests with Pickup. These were the results I got:
L52: Escape Rope, Full Heal, Hyper Potion, Ultra Ball, Revive, Rare Candy, Sun Stone, Moon Stone, Heart Scale, Iron Ball, TM 56 (Fling)
L71: Hyper Potion, Ultra Ball, Revive, Rare Candy, Moon Stone, Sun Stone, Heart Scale, Full Restore, Max Revive, Elixir, TM 86 (Grass Knot)
L91: Revive, Rare Candy, Sun Stone, Moon Stone, Heart Scale, Full Restore, Max Revive, PP Up, Max Elixir, TM 26 (Earthquake)
There should be another 1% chance item at L91, probably Leftovers, but after confirming TM 26 I felt like taking a break.
This list looks very similar to the DPPt Pickup table, so it's probably safe to assume they took the table and simply replaced some of the items, so that people couldn't get Dusk Stones before the National Dex via Pickup for example.
L52: Escape Rope, Full Heal, Hyper Potion, Ultra Ball, Revive, Rare Candy, Sun Stone, Moon Stone, Heart Scale, Iron Ball, TM 56 (Fling)
L71: Hyper Potion, Ultra Ball, Revive, Rare Candy, Moon Stone, Sun Stone, Heart Scale, Full Restore, Max Revive, Elixir, TM 86 (Grass Knot)
L91: Revive, Rare Candy, Sun Stone, Moon Stone, Heart Scale, Full Restore, Max Revive, PP Up, Max Elixir, TM 26 (Earthquake)
There should be another 1% chance item at L91, probably Leftovers, but after confirming TM 26 I felt like taking a break.
This list looks very similar to the DPPt Pickup table, so it's probably safe to assume they took the table and simply replaced some of the items, so that people couldn't get Dusk Stones before the National Dex via Pickup for example.