  We propose large $N_c$ generalizations for the "diquark" representations of
SU(3)$_{\rm flav}$ relevant for positive parity heavy baryons, including
putative exotic states. Next, within the framework of the Chiral Quark Soliton
Model, we calculate heavy baryon masses and decay widths. We show that in the
limit of $N_c \rightarrow \infty$ {\em all} decay widths vanish, including the
widths of exotica. This result is in fact more general than the model itself,
as it relies only on the underlying symmetries: i.e. SU(3)$_{\rm flav}$ and
hedgehog symmetry. Furthermore, using explicit model formulae for the decay
constants in the non-realtivistic limit, we show that there is a hierarchy of
the decay couplings, which may explain observed pattern of experimental widths.
