- Both Pickup activation and Pickup item are determined on last frame of the battle ("A gained XX EXP. Points!")
- Pickup activation and/or Pickup item seem to depend on the battle (encounter timing, encounter slot, battle RNG?)

BY FRAME (FROM LAST TEXT BOX OF BATTLE)
1		TM10
7		Persim Berry
21		Cheri Berry
36		Oran Berry
42		Aspear Berry
46		Rawst Berry
57		Pecha Berry
66		Persim Berry
68		Pamtre Berry
75		Cheri Berry
79		Aspear Berry
85		Oran Berry
97		Chesto Berry
144		Chesto Berry
155		Oran Berry
157		Persim Berry

BY ENCOUNTER
L15 Pidgey		Persim Berry
L13 Pidgey		Pecha Berry
L14 Meowth		Oran Berry
L15 Oddish		Persim Berry
L15 Pidgey		Pecha Berry
L13 Pidgey		Pecha Berry				(was 1 step after previous enc, which also gave Pecha)
L13 Pidgey		Pecha Berry
L16 Oddish		Aspear Berry
L16 Oddish		Chesto Berry
L13 Oddish		Persim Berry
L13 Oddish		Oran Berry
L13 Oddish		Aspear Berry
L12 Meowth		Rawst Berry
L10 Meowth		Cheri Berry
L13 Pidgey		Chesto Berry
L14 Meowth		Cheri Berry
L10 Meowth		Chesto Berry
L10 Meowth		Persim Berry
L16 Pidgey		Nugget
L13 Pidgey		Pecha Berry
L16 Oddish		Oran Berry
L13 Oddish		Nugget
L10 Meowth		Pecha Berry
L10 Meowth		Oran Berry
L16 Pidgey		Rawst Berry
L14 Meowth		Persim Berry
L13 Pidgey		Oran Berry
L15 Pidgey		Pecha Berry
L13 Pidgey		Oran Berry
L12 Meowth		Aspear Berry
L13 Oddish		Pecha Berry
L13 Pidgey		Cheri Berry
L15 Pidgey		TM10