A devotee once challenged Bhattar saying "Swamin! You show great devotion to Sri Rama but not to Sri Krishna. However, Lord Krishna is greater in one respect than Lord Rama and even you cannot deny that".

Bhattar asked him "What is that?"

The devotee replied "Lord Krishna went as a messenger for the Pandavas to the Kauravas. Lord Rama never did such an act. Therefore, you have to accept that Krishna is the more accesible form of the Lord".

Bhattar replied "You are saying this without reading Azhvar's pasuram on thiru-evvuL.

Thirumangai Azhvar says,

munnOr thUthu vAnaraththin vAyil mozhindhu, arakkan
mannOr thannai vALiyinAl mALA munindhu, avanE
pinnOr thUthu AdhimannarkkAgip peru nilaththAr
innAr thuthanena ninRAn evvuL kidanthAnE

That is, it is the same Rama who sent a message through Hanuman who later walked as a messenger Himself for the Pandavas. Therefore, you cannot say that Sri Rama did not go as a messenger.

However, even if you make such a claim, it is not that Rama could not be a messenger. He was born as a king and therefore no one asked Him to be one. Krishna was born in the yadava clan and therefore it was easy for the Pandavas to ask him to be their messenger. Had someone asked Rama to be a messenger, He would have gladly become one".