okay random question

today i was battling my lombre against.. i dont recall, but that pokemon was poison type and used acid on me.
and then i used absorb
and then the scroll at the bottom said..
"LOMBRE USED ABSORB!.... iT SUCKED UP ALL THE TOXIC ACID!"
or something like that
what the heck does that mean!? ahahah

ok the real question..

mudsport watersport etc..
whats the point? i only see water/grass pokemon use water sport and ground.rock pokemon using mud sport, thats the point if the type is already innefective/not very effective?

ex.

goldeen (of course has a mild resistance to FIRE..)
GOLDEEN USED WATER SPORT! FIRE'S POWER HAS BEEN WEAKEND!

whts the point sdjgbdsjgbfd

im sorry, im bored,

i love you all..