  We study models in which the 750 GeV diphoton excess is due to a scalar
decaying to two pseudo-Nambu-Goldstone bosons that subsequently decay into two
pairs of highly boosted photons, misidentified as individual photons.
Performing a model independent analysis we find that, with axion mass around
$200$ MeV, this class of theories can naturally explain the observed signal
with a large width, without violating monojet constraints. At the same time the
requirement of a prompt axion decay can be satisfied only with a relatively
large axion-photon coupling, leading to many new charged particles at the TeV
scale. However, the required multiplicities of such fields is still moderately
reduced relative to models with direct diphoton production.
