I fuse them because I doubt I ' ll ever need more than one of them and you get a higher bug count . It ' s up to you though , I say fuse them unless you feel the need to have multiples probably if they are S or SS class you could keep a dupe or two <| sep |> Chaining , since with a chain you can use a Cute Charm Pokemon to make females more common <| sep |> Started at hollow hold with legs low for 60 secs . Progressed to 65 sec hold wearing work boots . This week just started to get the hang of hollow rocks after ugly start I manage about 10 rocks before form suffers and abs start to fail . I ' ll introduce these into my warmups , keeping the hollow holds . <| sep |> Good point about our movement , had not thought of that .