https://www.legalserviceindia.com/article/l165-Power-of-Pardon.html
This goes over the various case laws on judicial review of pardoning powers.
“Considerations for exercise of power under Articles 72/161 may be myriad and their occasions protean, and are left to the appropriate Government, but no consideration nor occasion can be wholly irrelevant, irrational, discriminatory or mala fide. Only in these rare cases will the court examine the exercise.”
Similarly
In Satpal v State of Haryana the Supreme Court quashed an order of the Governor pardoning a person convicted of murder on the ground that the Governor had not been advised properly with all the relevant materials. The Court spelt out specifically the considerations that need to be taken account of while exercising the power of pardon, namely, the period of sentence in fact undergone by the said convict as well as his conduct and behavior while he underwent the sentence. The Court held that not being aware of such material facts would tend to make an order of granting pardon arbitrary and irrational. The Court also noted the fact that the accused was a member of a political party and had committed the murder during election year.
There are many other such cases. but I haven't found any case law or articles on if the rejection of pardons is also subject to judicial review on the same grounds, that the rejection was mala fide or not based on relevant material.
There was also the judgement in
https://indiankanoon.org/doc/758562
which seemed to point to the power to revoke pardons and re-sentence individuals. Am I interpreting this correctly?