Nearly all countries have bishops working there -- often several, and of different religions. It doesn't depend on their status as a crown colony; bishops are generally unaffiliated with the local government, but instead are employees of the central church authority. For instance, all Catholic bishops work for the Catholic Church, based in The Vatican.
There's a bishop wherever there are enough parishoners of their religion to support one (if that religion has bishops); the government only matters if the government doesn't tolerate their religion. British colonies don't outlaw any normal religions (assuming that's the crown you meant).
maintain the colony's defense and making profits
A Viceroy is a royal official who is in charge of running a particular country, colony or state in the name of and as a representative of the Monarch. The province in which they are in charge of is called a 'Viceroyalty'. The female form of a Viceroy is entitled a 'Vicereine'.
a bishop had a job to bless people
The job of the bishop was to provide a school to educate the priests and nuns of the roman cathlic church. PIE
He was a Catholic bishop.
his first job was to be a bishop in rome
He was a Catholic bishop.
He was a Roman Catholic priest and bishop.
because they did not do a good job
A kingdoms soldier job is to protect the kingdom and royal family.
St. Patrick was a missionary and bishop in Ireland.
He became a priest and, eventually, a bishop.