There is a lot of conflicting info about perfect IV of wild Pokemon during chaining, with some claiming guaranteed 2 IV after 40 chain, 3 IV after 60 chain and 4 IV after 80 chain. Is there a good source to confirm/deny this
I believe this is a good Source. Tell me if it isn't satisfactory and I will hide it. This is a chain to IV correlation chart.
1-20 Chain has 0 guaranteed IVs.
21-40 has 1 Guaranteed IV.
41-60 has 2 guaranteed IVs.
61+ has 3 guaranteed IVs.
Hope this helps!