Part pokemon am I,
or perhaps two,But not to belie,
what I think of you.I’m often confused,
with low ‘r campingOr expressly used,
when overbar adding.
What am I?
Hint 1
In the line "with low ‘r camping", the 'r stands for or. I did the 'r to make it flow smoother and to make the distinction between the two less obvious. But they ARE separate. "with low or camping". This is the line that the language tag applies to.
Hint 2
The first 4 lines are about the word, the "I'm often confused.." is to tell that the next 3 lines are mistaken words (homophones/mispellings) for it.
Hint 3
First 2 lines refer to 2 pokemon. The next 2 can be taken separately. The last 2 lines can be taken separately as well.
Hint 4 - updated
One of the answers below is almost there, they are just slightly missing the mark. If it's partially correct...then what must the other parts be?