The stickers with the tagline "Gotta catch and deport them all", have been put up by unidentified persons on bus stops, cashpoints and at tube stations in London.
Police are investigating the hate crime after the stickers, mock-up versions of Pokemon cards mimicking the real game's slogan "Gotta catch'em all", appeared, Metro.Co.Uk reported.
One such poster has given the name 'Hamaskhan' to Mayor Khan, an an apparent attempt to link him to Palestinian Islamist group Hamas, it reported.
One sticker features Obama, describing him as "the USA's Muslim in Chief", the report said.
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Another shows white Muslim convert Jordan Horner, who had called for Shariah Law in London, stating, "Gingermo is not a true Pakemon, having converted to Islam believing he might make some friends who are as angry and weak-minded as himself", it reported.
Stickers have been reported all over the capital, including Bromley, Surbiton and Waterloo.
Meanwhile, British Transport Police (BTP) has urged people to report any sightings of the stickers.
"British Transport Police is committed to preventing incidents of hate crime and prejudice and all incidents of this nature are investigated thoroughly.
"Everyone has the right to travel on the rail network without fear or intimidation. Racially or religiously motivated crime will simply not be tolerated," a BTP spokesman said.
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