The 15-games rule applies to one season only. Gaalinho and Phealinho need to play 15 games for the same team in the same season (not necessarily 15 games together, though).Re- the 15 games rule. Is that for a single season or cumulative?
Suppose you had Gaalinho who played 7 games in 2000 and 8 in 2001 could I link him with Phealinho?
Also if Gaalinho had played one game in the same season as Kiddinho (who is legit linked to Phealinho) would that be an invalid pick?
In order to pick Kiddinho, I'm not 100% sure about that (probably 80% sure), but if Kiddinho has a club link to Gaalinho as defined by EAP in the OP (doesn't have to be the same club as Kiddinho-Phealinho), then you cannot pick Kiddinho. Otherwise, you're free to do whatever you want (according to my interpretations).