He doesnt matter as Luffy has never been capable of beating anyone worth his salt with a single punch.
Kaido and his blunt weapon arent relevant here, we are talking about punchers.
Katakuri went down from 13, far away from 1 punch. He as a punchers couldnt beat Luffy with 113 punches.
Cracker didnt go down from damage accumulation but from exhaustion. He was at his end just from clapping for 11 hours.
There is no info about Garp taking damage from other sources. He was always fighting Kuzan. He sneaked into Shiryu vs Coby.
Garp had his hands full with Kuzan alone. Shiryu didnt step in. Others arent relevant to Garp.
Invisibility doesnt play a role to anyone who has basic Observation.
Marco was also "ragdolling" King and Queen, until it turned out that he didnt do anything to either of them...
Same thing with Garp here, he punches Kuzan and Shiryu and did nothing to them.
Nothing relevant at least, just like Marco did nothing relevant to King or Queen...
As I said, dont get fooled by the little hype of the croaking old guy.
Bellamy is worth. He is someone relevant enough. Being around 50mi at the time Luffy was 100mi and putting terror on Jaya is not for everyone.
Kaido and his blunt weapon is basically a punch but whatever.
Yes Katakuri is fucking weak and Luffy is strong. Still Katakuri went down with few punches from Luffy.
Headcannon about Cracker. He went down by one hit from Luffy. Ridiculous attack but one hit still.
Leakers says "
Garp show advantage when he fought black beard pirates" and "Scotch said Garp was fighting all of teach pirates not only aokiji , and apparently he's doing good .". So yes he is fighting all of them and probably taking damage from some of them. Not confirmed as you said but since he used his body to defend Coby why wouldn't he use his body to defend others?
If Garp was already busy with Aokiji he wouldn't be able to protect Coby from Shiryuu.
Invisibility did played a role against Sanji and Queen. Both having CoO. Hell people are getting attacked even without the attacker being invisible...
Garp's CoC attacks are way different from Marco's DF abilities. He is pulling some damage.