şpion

/ʃpion/

Cases

SingularPluralWhen to use it
nominativeşpionthe spyşpionlathe spiesthe plain dictionary form — the doer of the sentence
genitiveşpionnuthe spy'sşpionlanıthe spies'the owner — whose it is
accusativeşpionnuthe spy (as the object)şpionlanıthe spies (as the object)a specific, known object — whom or what
dativeşpiongato the spyşpionlağato the spiesdirection or recipient — to where, to whom
locativeşpiondaat / in the spyşpionladaat / in the spieswhere it is; also having — mende bar, "I have it"
ablativeşpiondanfrom the spyşpionladanfrom the spieswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myşpionummy spyşpionlarımmy spies
yourşpionungyour spyşpionlarıngyour spies
his / herşpionuhis / her spyşpionlarıhis / her spies
ourşpionubuzour spyşpionlarıbızour spies
you all'sşpionuğuzyou all's spyşpionlarığızyou all's spies
theirşpionlarıtheir spyşpionlarıtheir spies

The overlap in the last rows is real, not a mistake: şpionları can mean "his / her spies", "their spy", or "their spies" — context decides.